WO2011074372A1 - Needle device - Google Patents

Needle device Download PDF

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Publication number
WO2011074372A1
WO2011074372A1 PCT/JP2010/070603 JP2010070603W WO2011074372A1 WO 2011074372 A1 WO2011074372 A1 WO 2011074372A1 JP 2010070603 W JP2010070603 W JP 2010070603W WO 2011074372 A1 WO2011074372 A1 WO 2011074372A1
Authority
WO
WIPO (PCT)
Prior art keywords
inner hub
hole
hub
needle
opening
Prior art date
Application number
PCT/JP2010/070603
Other languages
French (fr)
Japanese (ja)
Inventor
伊藤亨
河野護
藤井亮至
Original Assignee
株式会社ジェイ・エム・エス
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2009283018A external-priority patent/JP5637350B2/en
Priority claimed from JP2009283017A external-priority patent/JP5532892B2/en
Application filed by 株式会社ジェイ・エム・エス filed Critical 株式会社ジェイ・エム・エス
Priority to US13/508,244 priority Critical patent/US8911405B2/en
Priority to CN201080052586.6A priority patent/CN102665798B/en
Priority to EP10837401.8A priority patent/EP2514452B1/en
Priority to KR1020127018130A priority patent/KR101717318B1/en
Publication of WO2011074372A1 publication Critical patent/WO2011074372A1/en
Priority to HK13103015.0A priority patent/HK1175726A1/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/36Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests with means for eliminating or preventing injection or infusion of air into body
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/158Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06Body-piercing guide needles or the like
    • A61M25/0612Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
    • A61M25/0631Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders having means for fully covering the needle after its withdrawal, e.g. needle being withdrawn inside the handle or a cover being advanced over the needle
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3293Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles characterised by features of the needle hub
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/34Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/34Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
    • A61M5/344Constructions for connecting the needle, e.g. to syringe nozzle or needle hub using additional parts, e.g. clamping rings or collets

Definitions

  • the present invention relates to a needle device including an inner hub in which a needle is integrally provided in a cylindrical main body.
  • a soft outer needle can be punctured together with a hard inner needle by puncturing a patient's arm or the like with a hard inner needle protruding from a soft outer needle. Thereafter, by pulling the hard inner needle into the cylindrical main body, only the soft outer needle can be placed in the puncture portion. Thereby, even when the patient moves, the pain at the puncture portion can be relieved, and damage to the blood vessel can be prevented.
  • the hard inner needle is integrated with the inner hub to which the tube is connected. By pulling the tube, the inner hub moves, and a hard inner needle integrated therewith can be drawn into the cylindrical main body.
  • a chemical solution or the like is supplied through a tube into an inner hub connected thereto, and further administered to a patient through a soft outer needle. If there is air in the indwelling needle device at the time of administration of the drug solution, the air enters the blood vessel together with the drug solution.
  • priming is performed in which the indwelling needle device is filled with a liquid such as physiological saline or nutrient in advance.
  • JP 2006-297062 A Republished WO2007 / 083770
  • the liquid injected into the indwelling needle device is discharged through the inner hub.
  • the injected liquid once flows into the inner hub, flows out from a hole formed in the inner hub, passes through a gap between the outer peripheral surface of the inner hub and the cylindrical main body, and then enters the inner needle.
  • the liquid did not spread sufficiently on the outer peripheral surface of the inner hub, and bubbles remained on the outer peripheral surface of the inner hub.
  • the present invention solves the conventional problems as described above, and an object of the present invention is to provide a needle device that can prevent air bubbles from staying on the outer peripheral surface of the inner hub.
  • the first needle device of the present invention includes an inner hub having a needle attached to the tip and a cylindrical main body in which the inner hub is housed.
  • the inner hub includes a through hole penetrating in the radial direction of the inner hub, and a recess formed in an outer peripheral surface of the inner hub. In the circumferential direction of the inner hub, the opening of the through hole and the recess are connected.
  • the second needle device of the present invention includes an inner hub having a needle attached to the tip, and a cylindrical main body in which the inner hub is housed.
  • the inner hub includes a through hole penetrating in the radial direction of the inner hub, and a protrusion formed between the opening of the through hole and the tip of the inner hub and protruding from the outer peripheral surface of the inner hub.
  • FIG. 1 is an external perspective view of an indwelling needle device 1A according to Embodiment 1 of the present invention.
  • FIG. 2 is a longitudinal sectional view of the indwelling needle device 1A shown in FIG. 3 is an enlarged view of the distal end side of the indwelling needle device 1A shown in FIG. 4 is a cross-sectional view showing a state in which the inner needle 8 is drawn into the shield tube 4 from the state of FIG.
  • FIG. 5 is an enlarged sectional view in the vicinity of the inner hub 9 according to the first embodiment of the present invention, and is an enlarged sectional view in the penetration direction of the through hole 22 of the inner hub 9.
  • FIG. 2 is a longitudinal sectional view of the indwelling needle device 1A shown in FIG. 3 is an enlarged view of the distal end side of the indwelling needle device 1A shown in FIG. 4 is a cross-sectional view showing a state in which the inner needle 8 is drawn into the shield tube 4 from the state of FIG.
  • FIG. 6 is an enlarged cross-sectional view in the vicinity of the inner hub 9 according to the first embodiment of the present invention, and is an enlarged cross-sectional view in the radial direction of the through hole 22 of the inner hub 9.
  • FIG. 7 is an enlarged perspective view of the inner hub 9 according to the first embodiment of the present invention.
  • FIG. 8 is an enlarged perspective view of the inner hub 100 according to the comparative example.
  • FIG. 9 is an enlarged perspective view of the inner hub 40 according to the second example of the first embodiment of the present invention.
  • FIG. 10 is an enlarged perspective view of the inner hub 50 according to the third example of the first embodiment of the present invention.
  • FIG. 11 is an enlarged perspective view of the inner hub 60 according to the fourth example of the first embodiment of the present invention.
  • FIG. 12 is an external perspective view of an indwelling needle device 1B according to Embodiment 2 of the present invention.
  • 13 is a cross-sectional view in the longitudinal direction of the indwelling needle device 1B shown in FIG. 14 is an enlarged view of the distal end side of the indwelling needle device 1B shown in FIG. 15 is a cross-sectional view showing a state in which the inner needle 8 is drawn into the shield tube 4 from the state of FIG.
  • FIG. 16 is an enlarged cross-sectional view in the vicinity of the inner hub 9 according to the second embodiment of the present invention, and is an enlarged cross-sectional view in the penetration direction of the through hole 22 of the inner hub 9.
  • FIG. 17 is an enlarged sectional view in the vicinity of the inner hub 9 according to the second embodiment of the present invention, and is an enlarged sectional view in the radial direction of the through hole 22 of the inner hub 9.
  • FIG. 18 is an enlarged perspective view of the inner hub 9 according to the second embodiment of the present invention.
  • FIG. 19 is an enlarged perspective view of the inner hub 200 according to the comparative example.
  • FIG. 20 is an enlarged perspective view of the inner hub 40 according to the second example of the embodiment of the present invention.
  • the concave portion connected to the opening of the through hole and the circumferential direction of the inner hub is formed on the outer peripheral surface of the inner hub, the flow of the liquid flowing out from the opening of the through hole Is restricted to flow along the recess, and can promote the flow of the liquid traveling in the circumferential direction of the inner hub. This facilitates the discharge of bubbles in the circumferential direction of the inner hub. Therefore, according to the present invention, when liquid is injected into the needle device in the priming operation, air can be reliably replaced with liquid, and bubbles can be prevented from staying on the outer peripheral surface of the inner hub.
  • the recess is arranged so as to guide the liquid flowing out from the opening of the through hole in the circumferential direction of the inner hub.
  • the opening of the through hole is preferably sandwiched between the recesses. This configuration is advantageous for promoting the discharge of bubbles in the circumferential direction of the inner hub.
  • the concave portion is divided at the partition surface, and that the depth of the concave portion becomes shallower from the opening side of the through hole toward the partition surface. According to this configuration, the bubbles run on the partition surface along with the flow of the liquid, and the bubbles easily flow to the front end side of the inner hub, which is advantageous for promoting the discharge of the bubbles.
  • the recess includes a portion extending in the axial direction of the inner hub. This configuration is advantageous for promoting the discharge of bubbles in the axial direction of the inner hub.
  • the width of the concave portion is 1 ⁇ 2 or less of the length of the opening of the through hole. According to this configuration, the liquid flow can be concentrated on the portion where the bubbles are likely to stay, which is advantageous for discharging the bubbles.
  • the liquid flowing out from the opening of the through hole formed in the inner hub is diverted to both sides of the protrusion, and the periphery of the inner hub is It is possible to promote the flow of liquid traveling in the direction. This facilitates the discharge of bubbles in the circumferential direction of the inner hub. Therefore, according to the present invention, when liquid is injected into the needle device in the priming operation, air can be reliably replaced with liquid, and bubbles can be prevented from staying on the outer peripheral surface of the inner hub.
  • the inner hub is provided with a concave portion in which an outer peripheral surface of the inner hub is recessed, and the protrusion protrudes from the concave portion. According to this configuration, the protrusion can be formed while maintaining the outer diameter of the inner hub.
  • the protrusion is arranged so as to guide the liquid flowing out from the opening of the through hole in the circumferential direction of the inner hub.
  • the wall surface of the protrusion and the opening of the through hole face each other when the protrusion is viewed in plan. According to this configuration, the flow of the liquid flowing out from the through hole is restricted by the wall surface of the protrusion, and a flow that is divided on both sides of the protrusion is generated, so that the flow of the liquid traveling in the circumferential direction of the inner hub is promoted.
  • the opening of the through hole is preferably sandwiched between the recesses.
  • the concave portion serves as a groove for guiding the liquid flow in the circumferential direction of the inner hub, which is advantageous for promoting the flow of the liquid traveling in the circumferential direction of the inner hub.
  • the dimension of the gap between the protrusion and the opening of the through hole is such that the opening of the through hole and the tip of the inner hub are It is preferable that it is 1/2 or less of the shortest distance between. According to this configuration, the liquid easily spreads from the through hole of the inner hub in the circumferential direction of the inner hub, which is advantageous for discharging bubbles.
  • the side surfaces on both sides of the projection are preferably arranged in a V shape, and the width of the projection is preferably widened toward the through hole. According to this configuration, since the tip of the protrusion has a sharp shape, it is possible to prevent bubbles from staying at the tip of the protrusion.
  • the present invention relates to a needle device.
  • the needle device of the present invention will be described using an example of a medical indwelling needle device in which a needle portion has a double structure of an outer needle and an inner needle.
  • Such an indwelling needle device is used at the time of infusion or blood transfusion, and can perform infusion or blood transfusion in a state where only a soft outer needle is indwelled at the puncture portion.
  • FIG. 1 is an external perspective view of an indwelling needle device 1A according to Embodiment 1 of the present invention.
  • FIG. 2 is a longitudinal sectional view of the indwelling needle device 1A shown in FIG. 3 is an enlarged view of the distal end side of the indwelling needle device 1A shown in FIG. 4 is a cross-sectional view showing a state in which the inner needle 8 is drawn into the shield tube 4 from the state of FIG.
  • the indwelling needle device 1A includes a cylindrical main body 2 having an outer hub 5 attached to the tip of the shield cylinder 4.
  • the main body 2 includes a needle portion 3 (FIG. 2) on the distal end side.
  • a cap 6 is attached to the needle portion 3.
  • Examples of the material of the shield tube 4 and the outer hub 5 include polycarbonate and polypropylene.
  • the needle part 3 has a double structure in which a metal hard inner needle 8 is inserted into a hollow part of a tube-shaped soft outer needle 7.
  • the outer needle 7 is fixed to the outer hub 5, and the inner needle 8 is fixed to the inner hub 9.
  • Examples of the material of the inner hub 9 include polycarbonate and polypropylene.
  • Examples of the material of the outer needle 7 include fluorine resins such as polyurethane elastomers and polytetrafluoroethylene.
  • the inner needle 8 is inserted through the hole 27 of the inner hub 9.
  • the inner needle 8 can be fixed to the inner hub 9 by applying an adhesive to the end 27 a of the hole 27.
  • the inner needle 8 protrudes into the through hole 22. If the protruding amount of the inner needle 8 is set to be sufficiently large, the inner needle 8 can be protruded into the through hole 22 even if the protruding amount of the inner needle 8 varies during manufacturing. For example, as shown in FIGS. 6 and 7 to be described later, the length of the through hole 22 in the axial direction of the inner hub 9 is to ensure the amount of protrusion of the inner needle 8 into the through hole 22. Because.
  • the distance between the end portion 27a of the hole 27 and the end portion 8a of the inner needle 8 is secured, so that the adhesive enters the hollow portion of the inner needle 8 and the adhesive plugs the inner needle 8. Can be prevented.
  • the inner needle 8 may be fixed to the inner hub 9 without causing the inner needle 8 to protrude into the through hole 22 as in the second embodiment described later.
  • the inner hub 9 is housed in the main body 2, and can move in the shield tube 4 in the axial direction of the shield tube 4.
  • An O-ring 15 for sealing is attached to the inner hub 9.
  • the tube 10 is connected to the tubular portion 20 on the rear end side of the inner hub 9 (see FIG. 5). By pulling the tube 10 in the direction of arrow a, the inner hub 9 moves in the shield cylinder 4 in the direction of arrow a. As a result, the inner needle 8 integrated with the inner hub 9 is pulled into the shield tube 4 as shown in FIG.
  • a ring portion 16 is attached to the shield tube 4 so as to wrap around the outer periphery of the shield tube 4.
  • a pair of wing parts 17 are provided integrally with the ring part 16.
  • a hub movement restricting member 11 is detachably attached to the shield tube 4.
  • the hub movement restricting member 11 includes a pair of cantilever portions 12. In FIG. 1, only one of the pair of cantilever portions 12 is shown, but the pair of cantilever portions 12 are arranged so as to sandwich the shield tube 4.
  • the hub movement restricting member 11 is integrally provided with a stopper 13.
  • the stopper 13 is inserted into the shield tube 4, and the tip 13 a abuts against the rear end surface 9 a of the inner hub 9.
  • the soft outer needle 7 is also punctured.
  • the gripping of the cantilever 12 is released, and the tube 10 is pulled in the direction of arrow a, whereby the inner needle 8 integrated with the inner hub 9 is shown in FIG. Is drawn into the shield tube 4.
  • the soft outer needle 7 can be placed in the puncture portion. Thereby, even when the patient moves, the pain at the puncture portion can be relieved, and damage to the blood vessel can be prevented.
  • a liquid such as a chemical solution to be administered to the patient is supplied from the tube 10 into the inner hub 9.
  • the inner hub 9 includes a flow path 21 along the axial direction of the inner hub 9 and a through hole 22 penetrating the inner hub 9 in the radial direction.
  • the flow path 21 and the through hole 22 are connected.
  • the liquid supplied into the inner hub 9 flows out from the inner hub 9 through the flow path 21 and the through hole 22.
  • the liquid flowing out from the inner hub 9 passes through the inside of the main body 2 to reach the hollow portion of the outer needle 7 and is administered into the patient's body.
  • the indwelling needle device 1A when there is air in the indwelling needle device 1A during administration of a drug solution or the like, the air enters the blood vessel together with the drug solution or the like. For this reason, prior to puncturing, an operation called priming is performed in which the indwelling needle device 1A is preliminarily filled with a liquid such as physiological saline or nutrient.
  • FIG. 5 shows an enlarged sectional view of the vicinity of the inner hub 9 in FIG.
  • FIG. 5 shows a cross section in the penetration direction of the through hole 22 of the inner hub 9.
  • 6 is an enlarged cross-sectional view of the vicinity of the inner hub 9 in a direction orthogonal to the cross-sectional direction of FIG. That is, FIG. 6 shows a cross section in the radial direction of the through hole 22 of the inner hub 9.
  • FIG. 7 shows an enlarged perspective view of the inner hub 9.
  • Priming operation is performed with the inner needle 8 protruding from the outer needle 7 as shown in FIG.
  • a liquid such as physiological saline is supplied from the tube 10 toward the inner hub 9 (in the direction of arrow b).
  • the liquid supplied to the inner hub 9 flows into the through hole 22 through the flow path 21.
  • a part of the liquid that has flowed into the through hole 22 flows toward the outer peripheral surface side of the inner hub 9, that is, toward the opening side of both ends of the through hole 22 (in the direction of arrow c).
  • the liquid that has flowed in the direction of arrow c passes between the outer peripheral surface of the inner hub 9 and the inner peripheral surface of the outer hub 5 and travels toward the tip 26 side of the inner hub 9.
  • FIG. 7 shows an enlarged perspective view of the inner hub 9.
  • the outer peripheral surface 23 of the inner hub 9 is formed with a concave portion 23a in which the outer peripheral surface 23 is recessed.
  • the recess 23 a is connected to the opening of the through hole 22.
  • the recess 23 a is formed so as to sandwich the through hole 22 in the circumferential direction of the inner hub 9.
  • the recessed part 23a is divided
  • the recess 23 a is formed so as to sandwich the through hole 22. Since the recess 23a connected to one opening of the through hole 22 and the recess 23a connected to the other opening of the through hole 22 are divided by the pair of partition surfaces 23b, they are not continuous in the circumferential direction.
  • the arrows e, f and g in FIG. 7 indicate the flow direction of the liquid flowing out from the through hole 22.
  • both sides of the opening of the through hole 22 in the circumferential direction of the inner hub 9 are connected to the pair of recesses 23a. In the portion where the recess 23a is formed, the liquid flows while being guided by the recess 23a.
  • the recess 23a is divided in the circumferential direction with the partition surface 23b as a boundary.
  • the depth of the recess 23a becomes shallower from the opening side of the through hole 22 toward the partition surface 23b.
  • the partition surface 23b is closer to the inner peripheral surface of the outer hub 5 than the portion where the recess 23a is formed, but is not completely in close contact (see FIG. 6). For this reason, a gap 30 is formed between the partition surface 23 b and the inner peripheral surface of the outer hub 5. Therefore, the liquid flow indicated by the arrow e in FIG. 7 can run on the partition surface 23b. After the liquid rides on the partition surface 23 b, the liquid flows toward the front end 26 side of the inner hub 9 while flowing through the gap 30.
  • FIGS. 5 and 6 show the outer peripheral surface 23 of the portion of the inner hub 9 where the recess 23a is not formed.
  • the outer peripheral surface 23 of the inner hub 9 shown in FIGS. 5 and 6 is close to the inner peripheral surface of the outer hub 5, but is not completely in close contact therewith. For this reason, a gap 31 is formed between the outer peripheral surface 23 of the inner hub 9 and the inner peripheral surface of the outer hub 5. Accordingly, the liquid indicated by the arrows f and g in FIG. 7 moves toward the tip 26 side of the inner hub 9 while flowing through the gap 31 (FIGS. 5 and 6).
  • the liquid flowing out of the through hole 22 proceeds in the axial direction of the inner hub 9 toward the tip 26 side of the inner hub 9 as a whole.
  • the flow proceeding in the circumferential direction of the inner hub 9 is also promoted.
  • the liquid that has flowed to the tip 26 of the inner hub 9 further moves into the outer needle 7.
  • the vicinity of the tip 26 of the inner hub 9 and the inner peripheral surface of the outer hub 5 are not completely in close contact with each other, and a gap 33 is formed between them.
  • a gap 34 is also formed between the hole of the outer hub 5 and the inner needle 8.
  • a gap 35 is also formed between the inner peripheral surface of the outer needle 7 and the outer peripheral surface of the inner needle 8.
  • the liquid flowing through the gap 31 toward the tip 26 of the inner hub 9 flows out from the tip of the outer needle 7 (arrow h) through the gap 33, the gap 34, and the gap 35.
  • the liquid traveling in the direction of the arrow d in FIG. 5 flows out from the tip of the inner needle 8 through the hollow portion of the inner needle 8 as indicated by the arrow i in FIG.
  • the space and the gap between the through hole 22 and the tips of the inner needle 8 and the outer needle 7 are filled with liquid, and from these spaces and gaps Air is exhausted.
  • FIG. 8 is a perspective view of the inner hub 100 according to the comparative example.
  • a through hole 102 penetrating in the radial direction is formed on the outer peripheral surface 101 of the inner hub 100 having no irregularities.
  • the concave portion 23a is not formed unlike the inner hub 9 shown in FIG.
  • the circumferential flow (arrow m) of the inner hub 100 is weak. For this reason, in the circumferential direction of the inner hub 100, the liquid becomes difficult to spread as the distance from the opening of the through hole 102 increases. Therefore, in the circumferential direction of the inner hub 100, bubbles are likely to stay in a portion far from the opening of the through hole 102.
  • the liquid flowing out from the opening of the through hole 22 is diverted to both sides in the circumferential direction of the through hole 22 by forming the recess 23a.
  • the flow proceeding in the circumferential direction of the hub 9 can be promoted. For this reason, in the circumferential direction of the inner hub 9, discharge of bubbles is promoted even at a portion far from the opening of the through hole 22.
  • the depth of the recess 23a becomes shallower from the opening of the through hole 22 toward the partition surface 23b.
  • the bubbles run on the partition surface 23b together with the flow of the liquid, and the bubbles easily flow toward the tip 26 side of the inner hub 9. This is also advantageous for promoting the discharge of bubbles.
  • the part which becomes shallow as the partition surface 23b is approached may be the entire recessed part 23a or a part of the recessed part 23a.
  • the depth of the recess 23a is constant in the region from the opening of the through hole 22 to a certain point in the circumferential direction, and gradually decreases in the region from this point to the partition surface 23 as it approaches the partition surface 23b. May be.
  • air can be reliably replaced with liquid by filling the liquid by the priming operation, and bubbles can be prevented from staying on the outer peripheral surface of the inner hub 9.
  • the retention of bubbles does not occur in the entire outer peripheral surface of the inner hub 9, but tends to occur selectively in a specific portion. For this reason, forming the recess 23a so as not to be too large so that the liquid flow concentrates on the portion where the bubbles tend to stay is effective in discharging the bubbles.
  • the width W of the recess 23 a is preferably equal to or less than 1 ⁇ 2 of the opening length L of the through hole 22. The same applies to the examples shown in FIGS. 9 to 11 below.
  • 9 to 11 illustrate one opening side of the through hole 22, the same shape as that illustrated in FIGS. 9 to 11 is formed on the other opening side of the through hole 22.
  • FIG. 9 is an enlarged perspective view of the inner hub 40 according to the second example of the first embodiment.
  • the recess 23a is divided in the circumferential direction with the partition surface 23b as a boundary, whereas in the inner hub 40 shown in FIG. 9, the portion where the through hole 22 is formed is excluded.
  • a recess 23 a is formed over the entire circumference of the inner hub 40.
  • FIG. 10 is an enlarged perspective view of the inner hub 50 according to the third example of the first embodiment.
  • a concave portion 51a in which the outer peripheral surface 51 is recessed is formed on the outer peripheral surface 51 of the inner hub 50.
  • the point which the recessed part 51a of the inner hub 50 contains the part B extended in the axial direction of the inner hub 50 differs from the example shown in the said FIG. 7, FIG.
  • a part of the recess 51a is branched by a protrusion 52 protruding from the bottom surface of the recess 51a.
  • a portion A of the recess 51a branched by the protrusion 52 is connected to the through hole 22 in the circumferential direction.
  • a portion (portion B) of the concave portion 51 a closer to the tip 53 of the inner hub 9 than the portion A is formed to extend in the axial direction of the inner hub 50.
  • the liquid flow indicated by the arrows f and g toward the tip 53 side of the inner hub 50 is generated as in the example of FIG.
  • a flow (arrows n, p) that proceeds in the circumferential direction of the inner hub 50 occurs.
  • the surface of the protrusion 52 and the inner peripheral surface of the outer hub 5 (FIG. 5) are not completely in close contact with each other, and a gap is formed between them. For this reason, a part of the flow (arrow n) traveling in the circumferential direction passes over the protrusion 52 and further proceeds in the circumferential direction.
  • the configuration of FIG. 10 is also advantageous for promoting the discharge of bubbles in the axial direction of the inner hub 50.
  • FIG. 11 is an enlarged perspective view of the inner hub 60 according to the fourth example of the first embodiment.
  • a concave portion 61a in which the outer peripheral surface 61 is recessed is formed on the outer peripheral surface 61 of the inner hub 60.
  • the point which the recessed part 61a of the inner hub 60 contains the part B extended in the axial direction of the inner hub 60 is different from the example shown in the said FIG. 7, FIG.
  • the opening of the through hole 22 is surrounded by the protrusion 62 except for the portion where the recess 61a is formed.
  • the portion A of the recess 61a is connected to the through hole 22 in the circumferential direction.
  • a portion (portion B) of the concave portion 61 a closer to the tip 63 of the inner hub 60 than the portion A is formed to extend in the axial direction of the inner hub 60.
  • a liquid flow indicated by arrows f and g toward the tip 63 side of the inner hub 60 occurs.
  • a flow (arrows n, p) that proceeds in the circumferential direction of the inner hub 50 occurs.
  • the outer peripheral surface 61 of the inner hub 60 where the recess 61a is not formed and the inner peripheral surface of the outer hub 5 (FIG. 5) are not completely in close contact with each other, and a gap is formed between them. For this reason, a part of the flow (arrow n) traveling in the circumferential direction gets over the outer surface 61 and further proceeds in the circumferential direction.
  • the flow (arrows p, n) that proceeds in the circumferential direction of the inner hub 60 along the recess 61a is promoted and the axial direction of the inner hub 60 is also promoted.
  • the forward flow (arrow r) is also promoted.
  • the configuration of FIG. 11 is also advantageous for promoting the discharge of bubbles in the axial direction of the inner hub 60.
  • the shape of the inner hub is such that the opening of the through hole and the recess are connected in the circumferential direction, and the recess flows the liquid flowing out of the opening of the through hole in the circumferential direction of the inner hub. Any shape that can be guided may be used, and the present invention is not limited to the above-described various examples.
  • FIG. 12 is an external perspective view of an indwelling needle device 1B according to Embodiment 2 of the present invention.
  • 13 is a cross-sectional view in the longitudinal direction of the indwelling needle device 1B shown in FIG. 14 is an enlarged view of the distal end side of the indwelling needle device 1B shown in FIG. 15 is a cross-sectional view showing a state in which the inner needle 8 is drawn into the shield tube 4 from the state of FIG.
  • the indwelling needle device 1B includes a cylindrical main body 2 having an outer hub 5 attached to the tip of the shield cylinder 4.
  • the main body 2 includes a needle portion 3 (FIG. 13) on the distal end side.
  • a cap 6 is attached to the needle portion 3.
  • Examples of the material of the shield tube 4 and the outer hub 5 include polycarbonate and polypropylene.
  • the needle portion 3 has a double structure in which a metal hard inner needle 8 is inserted into a hollow portion of a tube-shaped soft outer needle 7.
  • the outer needle 7 is fixed to the outer hub 5, and the inner needle 8 is fixed to the inner hub 9.
  • Examples of the material of the inner hub 9 include polycarbonate and polypropylene.
  • Examples of the material of the outer needle 7 include fluorine resins such as polyurethane elastomers and polytetrafluoroethylene.
  • the inner needle 8 does not protrude into the through hole 22, but the inner needle 8 may protrude into the through hole 22 and be fixed to the inner hub 9 as in the first embodiment.
  • the inner hub 9 is housed in the main body 2, and can move in the shield tube 4 in the axial direction of the shield tube 4.
  • An O-ring 15 for sealing is attached to the inner hub 9.
  • the tube 10 is connected to the tubular portion 20 on the rear end side of the inner hub 9 (see FIG. 16). By pulling the tube 10 in the direction of arrow a, the inner hub 9 moves in the shield cylinder 4 in the direction of arrow a. As a result, the inner needle 8 integrated with the inner hub 9 is drawn into the shield tube 4 as shown in FIG.
  • a ring portion 16 is attached to the shield tube 4 so as to wrap around the outer periphery of the shield tube 4.
  • a pair of wing parts 17 are provided integrally with the ring part 16.
  • a hub movement restricting member 11 is detachably attached to the shield tube 4.
  • the hub movement restricting member 11 includes a pair of cantilever portions 12. In FIG. 12, only one of the pair of cantilever portions 12 is shown, but the pair of cantilever portions 12 are arranged so as to sandwich the shield tube 4.
  • the hub movement restricting member 11 is integrally provided with a stopper 13.
  • the stopper 13 is inserted into the shield tube 4, and the tip 13 a abuts against the rear end surface 9 a of the inner hub 9.
  • the soft outer needle 7 is also punctured.
  • the gripping of the cantilever portion 12 is released, and the tube 10 is pulled in the direction of arrow a, whereby the inner needle 8 integrated with the inner hub 9 as shown in FIG. Is drawn into the shield tube 4.
  • the soft outer needle 7 can be placed in the puncture portion.
  • the inner hub 9 includes a flow path 21 along the axial direction of the inner hub 9 and a through hole 22 penetrating the inner hub 9 in the radial direction.
  • the flow path 21 and the through hole 22 are connected.
  • the liquid supplied into the inner hub 9 flows out from the inner hub 9 through the flow path 21 and the through hole 22.
  • the liquid flowing out from the inner hub 9 passes through the main body 2 to the hollow portion of the outer needle 7 and is administered into the patient's body.
  • the indwelling needle device 1B when there is air in the indwelling needle device 1B during administration of a drug solution or the like, the air enters the blood vessel together with the drug solution or the like. For this reason, prior to puncturing, an operation called priming is performed in which the indwelling needle device 1B is preliminarily filled with a liquid such as physiological saline or nutrient.
  • FIG. 16 shows an enlarged sectional view of the vicinity of the inner hub 9 in FIG.
  • FIG. 16 shows a cross section in the through direction of the through hole 22 of the inner hub 9.
  • FIG. 17 is an enlarged cross-sectional view of the vicinity of the inner hub 9 in a direction orthogonal to the cross-sectional direction of FIG. That is, FIG. 17 shows a cross section in the radial direction of the through hole 22 of the inner hub 9.
  • FIG. 18 shows an enlarged perspective view of the inner hub 9.
  • Priming operation is performed with the inner needle 8 protruding from the outer needle 7 as shown in FIG.
  • a liquid such as physiological saline is supplied from the tube 10 side toward the inner hub 9 (in the direction of arrow b).
  • the liquid supplied to the inner hub 9 flows into the through hole 22 through the flow path 21.
  • a part of the liquid that has flowed into the through hole 22 flows toward the outer peripheral surface side of the inner hub 9, that is, toward the opening side of both ends of the through hole 22 (in the direction of arrow c).
  • the liquid that has flowed in the direction of arrow c passes between the outer peripheral surface of the inner hub 9 and the inner peripheral surface of the outer hub 5 and travels toward the tip 26 side of the inner hub 9.
  • FIG. 18 shows an enlarged perspective view of the inner hub 9.
  • the outer peripheral surface 23 of the inner hub 9 includes a concave portion 23a in which the outer peripheral surface 23 is recessed, and the outer peripheral surface 23 is formed with irregularities. Further, a protrusion 25 protruding from the recess 23 a is formed on the end 26 side of the inner hub 9 of the through hole 22.
  • the recess 23a is formed by recessing the outer peripheral surface 23. For this reason, as shown in FIG. 16, a space 30 is formed between the recess 23 a and the inner peripheral surface of the outer hub 5.
  • the space 30 shown in FIG. 16 corresponds to a portion between the protrusion 25 and the tip 26 of the inner hub 9 in the recess 23a of the inner hub 9 shown in FIG.
  • the protrusion 25 protruding from the recess 23a in FIG. 18 is also illustrated in the sectional view of FIG. In FIG. 16, the surface of the protrusion 25 is close to the inner peripheral surface of the outer hub 5, but is not completely in close contact. For this reason, a gap 31 b is formed between the surface of the protrusion 25 and the inner peripheral surface of the outer hub 5.
  • the liquid flowing out of the through hole 22 moves toward the tip 26 side of the inner hub 9 while flowing through the gap 31b (FIG. 16), the space 30 (FIG. 16), and the gap 32 (FIG. 17).
  • FIG. 18 when the projection 25 is viewed in plan, the wall surface 25 a of the projection 25 faces the opening of the through hole 22. That is, the wall surface 25 a constitutes a part of the inner peripheral surface of the through hole 22. For this reason, when the liquid flows out from the through hole 22 toward the tip 26 side of the inner hub 9, the flow of the liquid is restricted by the wall surface 25 a of the protrusion 25, and a flow (arrows s, t) that is divided on both sides of the protrusion 25 is generated.
  • the flow in the direction of the arrow s mainly travels through the space 30 (FIG. 16) toward the tip 26 side of the inner hub 9, and the flow in the direction of the arrow t wraps around the portion of the outer peripheral surface 23 where the recess 23a is not formed. , Flows into the gap 32 (FIG. 17).
  • the liquid flowing out of the through hole 22 proceeds in the axial direction of the inner hub 9 toward the tip 26 side of the inner hub 9 as a whole.
  • the flow proceeding in the circumferential direction of the inner hub 9 is also promoted.
  • the liquid that has flowed to the tip 26 of the inner hub 9 further moves into the outer needle 7.
  • the vicinity of the tip 26 of the inner hub 9 and the inner peripheral surface of the outer hub 5 are not completely in close contact with each other, and a gap 33 is formed between them.
  • a gap 34 is also formed between the hole of the outer hub 5 and the inner needle 8.
  • a gap 35 is also formed between the inner peripheral surface of the outer needle 7 and the outer peripheral surface of the inner needle 8.
  • the liquid flowing toward the tip 26 of the inner hub 9 flows out from the tip of the outer needle 7 (arrow h) through the gap 33, the gap 34, and the gap 35.
  • the liquid traveling in the direction of the arrow d in FIG. 16 flows out from the tip of the inner needle 8 through the hollow portion of the inner needle 8 as indicated by the arrow i in FIG.
  • the space and the gap between the through hole 22 and the tip of the inner needle 8 and the outer needle 7 are filled with liquid, and from these spaces and the gap, Air is exhausted.
  • FIG. 19 shows a perspective view of an inner hub 200 according to a comparative example.
  • a through hole 202 penetrating in the radial direction is formed in the outer peripheral surface 201 of the inner hub 200 having no irregularities.
  • the concave portion 23a and the protrusion 25 are not formed unlike the inner hub 9 shown in FIG.
  • the liquid from the through hole 202 flows out toward the tip 203 side of the inner hub 200.
  • the liquid flow (arrow j) on the line connecting the through-hole 202 and the tip 203 is strong, and air is easily discharged together with this flow.
  • the flow (arrow m) in the circumferential direction of the inner hub 200 is weak.
  • the liquid becomes difficult to spread as the distance from the opening of the through hole 202 increases. Therefore, in the circumferential direction of the inner hub 200, bubbles are likely to stay in a portion far from the opening of the through hole 202.
  • the opening of the through hole 22 is sandwiched between the recesses 23a.
  • the recess 23 a serves as a groove for guiding the liquid flow in the circumferential direction of the inner hub 9. This also promotes the flow of liquid that proceeds in the circumferential direction of the inner hub 9.
  • air can be reliably replaced with liquid by filling the liquid by the priming operation, and air bubbles can be prevented from staying on the outer peripheral surface of the inner hub 9.
  • the shape of the protrusion 25 is not limited as long as it is arranged so as to guide the liquid flowing out from the opening of the through hole 22 toward the tip 26 side of the inner hub 9 in the circumferential direction of the inner hub 9.
  • the shape is not limited.
  • the side surfaces on both sides in the circumferential direction of the projection 25 are arranged in a substantially V shape, and the circumferential width of the projection 25 increases as it approaches the through hole 22. ing.
  • the liquid immediately after flowing out from the opening of the through hole 22 can be guided in the circumferential direction of the inner hub 9 by the wall surface 25a of the projection 25, and the tip portion (on the tip 26 side of the projection 25 ( Since the portion C) has a sharp shape, it is possible to prevent bubbles from staying at the tip C of the protrusion 25.
  • FIG. 20 is a perspective view of the inner hub 40 according to the second example of the second embodiment.
  • the inner hub 40 shown in this figure is different from the inner hub 9 shown in FIG. In the inner hub 9 shown in FIG. 18, no gap is formed between the protrusion 25 and the opening of the through hole 22.
  • a gap having a dimension d is formed between the protrusion 25 and the opening of the through hole 22.
  • the dimension d is the dimension of the gap between the protrusion 25 and the opening of the through hole 22 on the central axis 18 of the inner hub 9 when the inner hub 9 is viewed in plan.
  • the liquid flowing out from the opening of the through hole 22 is regulated by the wall surface 25a on the through hole 22 side of the protrusion 25 and is diverted in the circumferential direction. Promoted.
  • the dimension d is desirably less than or equal to 1 ⁇ 2 of the shortest distance L2 between the opening of the through hole 22 and the tip 26 of the inner hub 9.
  • the needle device according to the present invention can prevent air bubbles from staying on the outer peripheral surface of the inner hub, it is useful as, for example, a medical needle device used for transfusion or blood transfusion.

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Abstract

An inner hub (9), to the front end of which a needle is attached, is contained within a tubular body (2). The inner hub (9) includes a through-hole (22) which penetrates through the inner hub (9) in the radial direction thereof, and also includes a recess (23a) which is formed in the outer peripheral surface (23) of the inner hub (9). The openings of the through-hole (22) and the recesses (23a) are connected in the circumferential direction of the inner hub (9). Liquid which flows out of the openings of the through-hole (22) is restricted so as to flow along the recess (23a), and this promotes the flow of the liquid which advances in the circumferential direction of the inner hub (9). As a result, the discharge of bubbles in the circumferential direction of the inner hub (9) is promoted to prevent the bubbles from staying on the outer peripheral surface (23) of the inner hub (9).

Description

針装置Needle device
 本発明は、針が一体的に設けられた内ハブを筒状の本体内に備えた針装置に関する。 The present invention relates to a needle device including an inner hub in which a needle is integrally provided in a cylindrical main body.
 医療用の針装置として、例えば留置針装置が知られている。留置針装置は、輸液や輸血の際に用いられる。留置針装置として、筒状の本体の先端から突出した針部分が、軟質の外針と硬質の内針とからなる二重構造を有する留置針装置が知られている(特許文献1、2参照)。 For example, an indwelling needle device is known as a medical needle device. The indwelling needle device is used for infusion and blood transfusion. As an indwelling needle device, an indwelling needle device having a double structure in which a needle portion protruding from a distal end of a cylindrical main body includes a soft outer needle and a hard inner needle is known (see Patent Documents 1 and 2). ).
 このような留置針装置では、軟質の外針から突出させた硬質の内針を、患者の腕等に穿刺することにより、硬質の内針とともに軟質の外針も穿刺することができる。その後、硬質の内針を筒状の本体内に引き込むことにより、軟質の外針のみを穿刺部分に留置することができる。これにより、患者が動いた際においても、穿刺部分の痛みを和らげることができ、また、血管の損傷を防止することができる。 In such an indwelling needle device, a soft outer needle can be punctured together with a hard inner needle by puncturing a patient's arm or the like with a hard inner needle protruding from a soft outer needle. Thereafter, by pulling the hard inner needle into the cylindrical main body, only the soft outer needle can be placed in the puncture portion. Thereby, even when the patient moves, the pain at the puncture portion can be relieved, and damage to the blood vessel can be prevented.
 硬質の内針はチューブが接続された内ハブと一体化されている。チューブを引っ張ることにより内ハブが移動し、これと一体の硬質の内針を筒状の本体内に引き込むことができる。 ¡The hard inner needle is integrated with the inner hub to which the tube is connected. By pulling the tube, the inner hub moves, and a hard inner needle integrated therewith can be drawn into the cylindrical main body.
 前記の留置針装置では、薬液等は、チューブを通じて、これに接続された内ハブ内へ供給され、更に軟質の外針を通り、患者へ投与される。この薬液等の投与の際に、留置針装置内に空気があると、薬液等とともに空気が血管に入ってしまう。 In the above-mentioned indwelling needle device, a chemical solution or the like is supplied through a tube into an inner hub connected thereto, and further administered to a patient through a soft outer needle. If there is air in the indwelling needle device at the time of administration of the drug solution, the air enters the blood vessel together with the drug solution.
 このため、穿刺に先立って、留置針装置内を、あらかじめ生理食塩水、栄養剤等の液体で満たすプライミングと呼ばれる操作が行われる。 For this reason, prior to puncturing, an operation called priming is performed in which the indwelling needle device is filled with a liquid such as physiological saline or nutrient in advance.
特開2006-297062号公報JP 2006-297062 A 再公表WO2007/083770号公報Republished WO2007 / 083770
 しかしながら、前記の従来の留置針装置では、プライミング操作をしても、留置針装置内の気泡を排出するのが困難な場合があった。これは、留置針装置内に注入された液体は、内ハブを経て排出されるためである。具体的には、注入された液体は、いったん内ハブ内に流入し、内ハブに形成した孔から流出し、内ハブの外周面と筒状の本体との間の隙間を経て、外針内に至る。この過程で、内ハブの外周面に液体が十分に行き渡らず、内ハブの外周面に気泡が滞留し続ける場合があった。 However, in the conventional indwelling needle device, it may be difficult to discharge the air bubbles in the indwelling needle device even if the priming operation is performed. This is because the liquid injected into the indwelling needle device is discharged through the inner hub. Specifically, the injected liquid once flows into the inner hub, flows out from a hole formed in the inner hub, passes through a gap between the outer peripheral surface of the inner hub and the cylindrical main body, and then enters the inner needle. To. In this process, there was a case where the liquid did not spread sufficiently on the outer peripheral surface of the inner hub, and bubbles remained on the outer peripheral surface of the inner hub.
 本発明は、前記のような従来の問題を解決するものであり、内ハブの外周面における気泡の滞留を防止することができる針装置を提供することを目的とする。 The present invention solves the conventional problems as described above, and an object of the present invention is to provide a needle device that can prevent air bubbles from staying on the outer peripheral surface of the inner hub.
 本発明の第1の針装置は、先端に針が取り付けられた内ハブと、前記内ハブが収納されている筒状の本体とを備える。前記内ハブは、前記内ハブの径方向に貫通した貫通孔と、前記内ハブの外周面に形成された凹部とを含む。前記内ハブの周方向において、前記貫通孔の開口と前記凹部とがつながっている。 The first needle device of the present invention includes an inner hub having a needle attached to the tip and a cylindrical main body in which the inner hub is housed. The inner hub includes a through hole penetrating in the radial direction of the inner hub, and a recess formed in an outer peripheral surface of the inner hub. In the circumferential direction of the inner hub, the opening of the through hole and the recess are connected.
 本発明の第2の針装置は、先端に針が取り付けられた内ハブと、前記内ハブが収納されている筒状の本体とを備える。前記内ハブは、前記内ハブの径方向に貫通した貫通孔と、前記貫通孔の開口と前記内ハブの先端との間に形成され、前記内ハブの外周面から突出した突起とを含む。 The second needle device of the present invention includes an inner hub having a needle attached to the tip, and a cylindrical main body in which the inner hub is housed. The inner hub includes a through hole penetrating in the radial direction of the inner hub, and a protrusion formed between the opening of the through hole and the tip of the inner hub and protruding from the outer peripheral surface of the inner hub.
 本発明によれば、内ハブの外周面における気泡の滞留を防止することができる。 According to the present invention, it is possible to prevent air bubbles from staying on the outer peripheral surface of the inner hub.
図1は、本発明の実施の形態1に係る留置針装置1Aの外観斜視図である。FIG. 1 is an external perspective view of an indwelling needle device 1A according to Embodiment 1 of the present invention. 図2は、図1に示した留置針装置1Aの長手方向の断面図である。FIG. 2 is a longitudinal sectional view of the indwelling needle device 1A shown in FIG. 図3は、図2に示した留置針装置1Aの先端側の拡大図である。3 is an enlarged view of the distal end side of the indwelling needle device 1A shown in FIG. 図4は、図2の状態から内針8をシールド筒4に引き込んだ状態を示す断面図である。4 is a cross-sectional view showing a state in which the inner needle 8 is drawn into the shield tube 4 from the state of FIG. 図5は、本発明の実施形態1に係る内ハブ9近傍の拡大断面図であり、内ハブ9の貫通孔22の貫通方向における拡大断面図である。FIG. 5 is an enlarged sectional view in the vicinity of the inner hub 9 according to the first embodiment of the present invention, and is an enlarged sectional view in the penetration direction of the through hole 22 of the inner hub 9. 図6は、本発明の実施形態1に係る内ハブ9近傍の拡大断面図であり、内ハブ9の貫通孔22の径方向における拡大断面図である。FIG. 6 is an enlarged cross-sectional view in the vicinity of the inner hub 9 according to the first embodiment of the present invention, and is an enlarged cross-sectional view in the radial direction of the through hole 22 of the inner hub 9. 図7は、本発明の実施形態1に係る内ハブ9の拡大斜視図である。FIG. 7 is an enlarged perspective view of the inner hub 9 according to the first embodiment of the present invention. 図8は、比較例に係る内ハブ100の拡大斜視図である。FIG. 8 is an enlarged perspective view of the inner hub 100 according to the comparative example. 図9は、本発明の実施形態1の第2の例に係る内ハブ40の拡大斜視図である。FIG. 9 is an enlarged perspective view of the inner hub 40 according to the second example of the first embodiment of the present invention. 図10は、本発明の実施形態1の第3の例に係る内ハブ50の拡大斜視図である。FIG. 10 is an enlarged perspective view of the inner hub 50 according to the third example of the first embodiment of the present invention. 図11は、本発明の実施形態1の第4の例に係る内ハブ60の拡大斜視図である。FIG. 11 is an enlarged perspective view of the inner hub 60 according to the fourth example of the first embodiment of the present invention. 図12は、本発明の実施の形態2に係る留置針装置1Bの外観斜視図である。FIG. 12 is an external perspective view of an indwelling needle device 1B according to Embodiment 2 of the present invention. 図13は、図12に示した留置針装置1Bの長手方向の断面図である。13 is a cross-sectional view in the longitudinal direction of the indwelling needle device 1B shown in FIG. 図14は、図13に示した留置針装置1Bの先端側の拡大図である。14 is an enlarged view of the distal end side of the indwelling needle device 1B shown in FIG. 図15は、図13の状態から内針8をシールド筒4に引き込んだ状態を示す断面図である。15 is a cross-sectional view showing a state in which the inner needle 8 is drawn into the shield tube 4 from the state of FIG. 図16は、本発明の実施の形態2に係る内ハブ9近傍の拡大断面図であり、内ハブ9の貫通孔22の貫通方向における拡大断面図である。FIG. 16 is an enlarged cross-sectional view in the vicinity of the inner hub 9 according to the second embodiment of the present invention, and is an enlarged cross-sectional view in the penetration direction of the through hole 22 of the inner hub 9. 図17は、本発明の実施形態2に係る内ハブ9近傍の拡大断面図であり、内ハブ9の貫通孔22の径方向における拡大断面図である。FIG. 17 is an enlarged sectional view in the vicinity of the inner hub 9 according to the second embodiment of the present invention, and is an enlarged sectional view in the radial direction of the through hole 22 of the inner hub 9. 図18は、本発明の実施形態2に係る内ハブ9の拡大斜視図である。FIG. 18 is an enlarged perspective view of the inner hub 9 according to the second embodiment of the present invention. 図19は、比較例に係る内ハブ200の拡大斜視図である。FIG. 19 is an enlarged perspective view of the inner hub 200 according to the comparative example. 図20は、本発明の実施形態の第2の例に係る内ハブ40の拡大斜視図である。FIG. 20 is an enlarged perspective view of the inner hub 40 according to the second example of the embodiment of the present invention.
 本発明の第1の針装置によれば、内ハブの外周面に、貫通孔の開口と内ハブの周方向につながった凹部が形成されているので、貫通孔の開口から流出した液体の流れは、凹部に沿って流れるように規制され、内ハブの周方向に進む液体の流れを促進させることができる。このことにより、内ハブの周方向における気泡の排出が促進される。従って、本発明によれば、プライミング操作において針装置に液体を注入すると、空気を液体に確実に置換することができ、内ハブの外周面に気泡が滞留することを防止することができる。 According to the first needle device of the present invention, since the concave portion connected to the opening of the through hole and the circumferential direction of the inner hub is formed on the outer peripheral surface of the inner hub, the flow of the liquid flowing out from the opening of the through hole Is restricted to flow along the recess, and can promote the flow of the liquid traveling in the circumferential direction of the inner hub. This facilitates the discharge of bubbles in the circumferential direction of the inner hub. Therefore, according to the present invention, when liquid is injected into the needle device in the priming operation, air can be reliably replaced with liquid, and bubbles can be prevented from staying on the outer peripheral surface of the inner hub.
 前記本発明の第1の針装置においては、前記凹部は、前記貫通孔の開口から流出した液体を前記内ハブの周方向に導くように配置されていることが好ましい。 In the first needle device of the present invention, it is preferable that the recess is arranged so as to guide the liquid flowing out from the opening of the through hole in the circumferential direction of the inner hub.
 前記内ハブの周方向において、前記貫通孔の開口は前記凹部に挟まれていることが好ましい。この構成によれば、内ハブの周方向における気泡の排出の促進に有利になる。 In the circumferential direction of the inner hub, the opening of the through hole is preferably sandwiched between the recesses. This configuration is advantageous for promoting the discharge of bubbles in the circumferential direction of the inner hub.
 前記凹部は、仕切り面を境に分割されており、かつ前記凹部内に、その深さが、前記貫通孔の開口側から前記仕切り面に近づくにつれて浅くなっている部分があることが好ましい。この構成によれば、液体の流れとともに気泡が仕切り面に乗り上げ、気泡が内ハブの先端側に流動し易くなるので、気泡の排出の促進に有利になる。 It is preferable that the concave portion is divided at the partition surface, and that the depth of the concave portion becomes shallower from the opening side of the through hole toward the partition surface. According to this configuration, the bubbles run on the partition surface along with the flow of the liquid, and the bubbles easily flow to the front end side of the inner hub, which is advantageous for promoting the discharge of the bubbles.
 前記凹部は、前記内ハブの軸方向に延びた部分を含んでいることが好ましい。この構成によれば、内ハブの軸方向における気泡の排出の促進に有利になる。 It is preferable that the recess includes a portion extending in the axial direction of the inner hub. This configuration is advantageous for promoting the discharge of bubbles in the axial direction of the inner hub.
 前記内ハブの軸方向において、前記凹部の幅は、前記貫通孔の開口の長さの1/2以下であることが好ましい。この構成によれば、気泡の滞留し易い部分に液体の流れを集中させることができるので、気泡の排出に有利になる。 In the axial direction of the inner hub, it is preferable that the width of the concave portion is ½ or less of the length of the opening of the through hole. According to this configuration, the liquid flow can be concentrated on the portion where the bubbles are likely to stay, which is advantageous for discharging the bubbles.
 本発明の第2の針装置によれば、内ハブに突起が形成されているので、内ハブに形成された貫通孔の開口から流出した液体は、突起の両側に分流され、内ハブの周方向に進む液体の流れを促進させることができる。このことにより、内ハブの周方向における気泡の排出が促進される。従って、本発明によれば、プライミング操作において針装置に液体を注入すると、空気を液体に確実に置換することができ、内ハブの外周面に気泡が滞留することを防止することができる。 According to the second needle device of the present invention, since the protrusion is formed on the inner hub, the liquid flowing out from the opening of the through hole formed in the inner hub is diverted to both sides of the protrusion, and the periphery of the inner hub is It is possible to promote the flow of liquid traveling in the direction. This facilitates the discharge of bubbles in the circumferential direction of the inner hub. Therefore, according to the present invention, when liquid is injected into the needle device in the priming operation, air can be reliably replaced with liquid, and bubbles can be prevented from staying on the outer peripheral surface of the inner hub.
 前記本発明の第2の針装置においては、前記内ハブは、前記内ハブの外周面を窪ませた凹部を備えており、前記突起は、前記凹部から突出していることが好ましい。この構成によれば、内ハブの外径寸法を維持したままで、突起を形成することができる。 In the second needle device of the present invention, it is preferable that the inner hub is provided with a concave portion in which an outer peripheral surface of the inner hub is recessed, and the protrusion protrudes from the concave portion. According to this configuration, the protrusion can be formed while maintaining the outer diameter of the inner hub.
 前記突起は、前記貫通孔の開口から流出した液体を前記内ハブの周方向に導くように配置されていることが好ましい。 It is preferable that the protrusion is arranged so as to guide the liquid flowing out from the opening of the through hole in the circumferential direction of the inner hub.
 前記突起を平面視したときに、前記突起の壁面と前記貫通孔の開口とが対向していることが好ましい。この構成によれば、貫通孔から流出した液体の流れが突起の壁面により規制され、突起の両側に分流した流れが生じるので、内ハブの周方向に進む液体の流れが促進される。 It is preferable that the wall surface of the protrusion and the opening of the through hole face each other when the protrusion is viewed in plan. According to this configuration, the flow of the liquid flowing out from the through hole is restricted by the wall surface of the protrusion, and a flow that is divided on both sides of the protrusion is generated, so that the flow of the liquid traveling in the circumferential direction of the inner hub is promoted.
 前記内ハブの周方向において、前記貫通孔の開口は前記凹部に挟まれていることが好ましい。この構成によれば、凹部が液体の流れを内ハブの周方向に案内する溝の役割を果たすので、内ハブの周方向に進む液体の流れの促進に有利になる。 In the circumferential direction of the inner hub, the opening of the through hole is preferably sandwiched between the recesses. According to this configuration, the concave portion serves as a groove for guiding the liquid flow in the circumferential direction of the inner hub, which is advantageous for promoting the flow of the liquid traveling in the circumferential direction of the inner hub.
 また、前記内ハブを平面視したときに、前記内ハブの中心軸上において、前記突起と前記貫通孔の開口との間の隙間の寸法は、前記貫通孔の開口と前記内ハブの先端との間の最短距離の1/2以下であることが好ましい。この構成によれば、内ハブの貫通孔から内ハブの周方向に液体が行き渡り易くなるので、気泡の排出により有利である。 Further, when the inner hub is viewed in plan, on the central axis of the inner hub, the dimension of the gap between the protrusion and the opening of the through hole is such that the opening of the through hole and the tip of the inner hub are It is preferable that it is 1/2 or less of the shortest distance between. According to this configuration, the liquid easily spreads from the through hole of the inner hub in the circumferential direction of the inner hub, which is advantageous for discharging bubbles.
 また、前記突起を平面視したときに、前記突起の両側の側面が略V字状に配置されており、前記突起の幅は前記貫通孔に向かうにつれて広がっていることが好ましい。この構成によれば、突起の先端部が尖った形状になるので、突起の先端部に気泡が滞留することを防止することができる。 Further, when the projection is viewed in plan, the side surfaces on both sides of the projection are preferably arranged in a V shape, and the width of the projection is preferably widened toward the through hole. According to this configuration, since the tip of the protrusion has a sharp shape, it is possible to prevent bubbles from staying at the tip of the protrusion.
 以下に、本発明を好適な実施形態を示しながら詳細に説明する。但し、本発明は以下の実施形態に限定されないことはいうまでもない。以下の説明において参照する各図は、説明の便宜上、本発明の実施形態の構成部材のうち、本発明を説明するために必要な主要部材のみを簡略化して示したものである。従って、本発明は以下の各図に示されていない任意の部材を備え得る。 Hereinafter, the present invention will be described in detail while showing preferred embodiments. However, it goes without saying that the present invention is not limited to the following embodiments. For convenience of explanation, the drawings referred to in the following description show only the main members necessary for explaining the present invention in a simplified manner among the constituent members of the embodiment of the present invention. Therefore, the present invention can include any member not shown in the following drawings.
 本発明は針装置に関するものである。以下の実施形態において、本発明の針装置を、針部分が外針と内針との二重構造を有する医療用の留置針装置の例を用いて説明する。このような留置針装置は、輸液や輸血の際に用いられ、軟質の外針のみを穿刺部分に留置した状態で輸液や輸血を行なうことができる。 The present invention relates to a needle device. In the following embodiments, the needle device of the present invention will be described using an example of a medical indwelling needle device in which a needle portion has a double structure of an outer needle and an inner needle. Such an indwelling needle device is used at the time of infusion or blood transfusion, and can perform infusion or blood transfusion in a state where only a soft outer needle is indwelled at the puncture portion.
 (実施形態1)
 図1は、本発明の実施形態1に係る留置針装置1Aの外観斜視図である。図2は、図1に示した留置針装置1Aの長手方向の断面図である。図3は、図2に示した留置針装置1Aの先端側の拡大図である。図4は、図2の状態から内針8をシールド筒4に引き込んだ状態を示す断面図である。まず図1~図4を参照しながら、留置針装置1Aの基本的な構成について説明する。
(Embodiment 1)
FIG. 1 is an external perspective view of an indwelling needle device 1A according to Embodiment 1 of the present invention. FIG. 2 is a longitudinal sectional view of the indwelling needle device 1A shown in FIG. 3 is an enlarged view of the distal end side of the indwelling needle device 1A shown in FIG. 4 is a cross-sectional view showing a state in which the inner needle 8 is drawn into the shield tube 4 from the state of FIG. First, the basic configuration of the indwelling needle device 1A will be described with reference to FIGS.
 図1,図2において、留置針装置1Aは、シールド筒4の先端に外ハブ5が取り付けられた筒状の本体2を備える。本体2は、その先端側に針部3(図2)を備えている。図1では針部3には、キャップ6が装着されている。シールド筒4及び外ハブ5の材料としては、例えばポリカーボネート、ポリプロピレンが挙げられる。 1 and 2, the indwelling needle device 1A includes a cylindrical main body 2 having an outer hub 5 attached to the tip of the shield cylinder 4. The main body 2 includes a needle portion 3 (FIG. 2) on the distal end side. In FIG. 1, a cap 6 is attached to the needle portion 3. Examples of the material of the shield tube 4 and the outer hub 5 include polycarbonate and polypropylene.
 図3に示したように、針部3は、チューブ状の軟質の外針7の中空部内に、金属製の硬質の内針8が挿通された二重構造を有している。外針7は外ハブ5に固定され、内針8は、内ハブ9に固定されている。内ハブ9の材料としては、例えばポリカーボネート、ポリプロピレンが挙げられる。外針7の材料としては、例えばポリウレタン系エラストマー、ポリテトラフルオロエチレン等のフッ素樹脂が挙げられる。 As shown in FIG. 3, the needle part 3 has a double structure in which a metal hard inner needle 8 is inserted into a hollow part of a tube-shaped soft outer needle 7. The outer needle 7 is fixed to the outer hub 5, and the inner needle 8 is fixed to the inner hub 9. Examples of the material of the inner hub 9 include polycarbonate and polypropylene. Examples of the material of the outer needle 7 include fluorine resins such as polyurethane elastomers and polytetrafluoroethylene.
 図3において、内針8は内ハブ9の孔27を挿通している。孔27の端部27aに接着剤を塗布することにより、内針8を内ハブ9に固定することができる。内針8は貫通孔22内に突出している。内針8の突出量を十分大きく設定しておけば、製造時に内針8の突出量がばらついても、内針8を貫通孔22内に突出させることができる。例えば後述する図6、図7に示したように、貫通孔22の内ハブ9の軸方向における長さを長くしているのは、内針8の貫通孔22内への突出量を確保するためである。このことにより、孔27の端部27aと内針8の端部8aとの間の距離が確保されるので、接着剤が内針8の中空部に入り、接着剤が内針8を塞ぐことを防止できる。なお、後述する実施形態2のように、内針8を貫通孔22内に突出させることなく、内針8を内ハブ9に固定してもよい。 3, the inner needle 8 is inserted through the hole 27 of the inner hub 9. The inner needle 8 can be fixed to the inner hub 9 by applying an adhesive to the end 27 a of the hole 27. The inner needle 8 protrudes into the through hole 22. If the protruding amount of the inner needle 8 is set to be sufficiently large, the inner needle 8 can be protruded into the through hole 22 even if the protruding amount of the inner needle 8 varies during manufacturing. For example, as shown in FIGS. 6 and 7 to be described later, the length of the through hole 22 in the axial direction of the inner hub 9 is to ensure the amount of protrusion of the inner needle 8 into the through hole 22. Because. As a result, the distance between the end portion 27a of the hole 27 and the end portion 8a of the inner needle 8 is secured, so that the adhesive enters the hollow portion of the inner needle 8 and the adhesive plugs the inner needle 8. Can be prevented. Note that the inner needle 8 may be fixed to the inner hub 9 without causing the inner needle 8 to protrude into the through hole 22 as in the second embodiment described later.
 図2に示したように、内ハブ9は本体2内に収納されており、シールド筒4内を、シールド筒4の軸方向に移動可能である。内ハブ9には、シール用のOリング15が装着されている。内ハブ9の後端側の管状部20に、チューブ10が接続されている(図5参照)。チューブ10を矢印a方向に引くことにより、内ハブ9はシールド筒4内を矢印a方向に移動する。このことにより、内ハブ9と一体の内針8は、図4に示したように、シールド筒4内に引き込まれる。 As shown in FIG. 2, the inner hub 9 is housed in the main body 2, and can move in the shield tube 4 in the axial direction of the shield tube 4. An O-ring 15 for sealing is attached to the inner hub 9. The tube 10 is connected to the tubular portion 20 on the rear end side of the inner hub 9 (see FIG. 5). By pulling the tube 10 in the direction of arrow a, the inner hub 9 moves in the shield cylinder 4 in the direction of arrow a. As a result, the inner needle 8 integrated with the inner hub 9 is pulled into the shield tube 4 as shown in FIG.
 図1において、シールド筒4には、シールド筒4の外周を包み込むようにリング部16が取り付けられている。リング部16には、一対の翼部17が一体に設けられている。さらに、シールド筒4には、ハブ移動規制部材11が脱着可能に取り付けられている。ハブ移動規制部材11は、一対の片持部12を備えている。図1では、一対の片持部12のうち一方しか図示されていないが、シールド筒4を挟むように、一対の片持部12が配置されている。 In FIG. 1, a ring portion 16 is attached to the shield tube 4 so as to wrap around the outer periphery of the shield tube 4. A pair of wing parts 17 are provided integrally with the ring part 16. Further, a hub movement restricting member 11 is detachably attached to the shield tube 4. The hub movement restricting member 11 includes a pair of cantilever portions 12. In FIG. 1, only one of the pair of cantilever portions 12 is shown, but the pair of cantilever portions 12 are arranged so as to sandwich the shield tube 4.
 図1の状態で、一対の翼部17を上方に持ち上げて把持すると、一対の片持部12の先端部12aは一対の翼部17を介してリング部16に押し付けられるように把持される。一対の片持部12がこのように把持されている間は、ハブ移動規制部材11はシールド筒4に固定される。 In the state of FIG. 1, when the pair of wing portions 17 are lifted and gripped, the tip portions 12 a of the pair of cantilever portions 12 are gripped so as to be pressed against the ring portion 16 via the pair of wing portions 17. While the pair of cantilevers 12 are gripped in this way, the hub movement restricting member 11 is fixed to the shield tube 4.
 更に、図2に示したように、ハブ移動規制部材11には、ストッパー13が一体に設けられている。図2の状態では、ストッパー13はシールド筒4内に挿入され、その先端13aが、内ハブ9の後端面9aに当接している。 Furthermore, as shown in FIG. 2, the hub movement restricting member 11 is integrally provided with a stopper 13. In the state of FIG. 2, the stopper 13 is inserted into the shield tube 4, and the tip 13 a abuts against the rear end surface 9 a of the inner hub 9.
 このため、ハブ移動規制部材11の片持部12が把持されている状態では、内ハブ9及びこれと一体の内針8の移動も規制される。したがって、この状態で、内針8がシールド筒4側に押し戻されることなく、内針8を患者に穿刺することができる。 For this reason, when the cantilever 12 of the hub movement restricting member 11 is gripped, the movement of the inner hub 9 and the inner needle 8 integrated therewith is also restricted. Therefore, in this state, the inner needle 8 can be punctured into the patient without the inner needle 8 being pushed back to the shield tube 4 side.
 内針8の穿刺の際に、軟質の外針7も穿刺される。内針8及び外針7を穿刺した後に、片持部12の把持を解除し、チューブ10を矢印a方向に引くことにより、図4に示したように、内ハブ9と一体の内針8は、シールド筒4内に引き込まれる。このことにより、軟質の外針7のみを穿刺部分に留置することができる。これにより、患者が動いた際においても、穿刺部分の痛みを和らげることができ、また、血管の損傷を防止することができる。 When the inner needle 8 is punctured, the soft outer needle 7 is also punctured. After puncturing the inner needle 8 and the outer needle 7, the gripping of the cantilever 12 is released, and the tube 10 is pulled in the direction of arrow a, whereby the inner needle 8 integrated with the inner hub 9 is shown in FIG. Is drawn into the shield tube 4. Thus, only the soft outer needle 7 can be placed in the puncture portion. Thereby, even when the patient moves, the pain at the puncture portion can be relieved, and damage to the blood vessel can be prevented.
 図4の状態において、患者へ投与する薬液等の液体は、チューブ10から内ハブ9内へ供給される。内ハブ9は、内ハブ9の軸方向に沿った流路21と、内ハブ9を、その径方向に貫通した貫通孔22とを備えている。流路21と貫通孔22とはつながっている。内ハブ9内に供給された液体は、流路21及び貫通孔22を経て、内ハブ9から流出する。内ハブ9から流出した液体は、本体2内を経て外針7の中空部に至り、患者の体内に投与される。 4, a liquid such as a chemical solution to be administered to the patient is supplied from the tube 10 into the inner hub 9. The inner hub 9 includes a flow path 21 along the axial direction of the inner hub 9 and a through hole 22 penetrating the inner hub 9 in the radial direction. The flow path 21 and the through hole 22 are connected. The liquid supplied into the inner hub 9 flows out from the inner hub 9 through the flow path 21 and the through hole 22. The liquid flowing out from the inner hub 9 passes through the inside of the main body 2 to reach the hollow portion of the outer needle 7 and is administered into the patient's body.
 ここで、薬液等の投与の際に、留置針装置1A内に空気があると、薬液等とともに空気が血管に入ってしまう。このため、穿刺に先立って、留置針装置1A内に、あらかじめ生理食塩水、栄養剤等の液体を充填するプライミングと呼ばれる操作が行われる。 Here, when there is air in the indwelling needle device 1A during administration of a drug solution or the like, the air enters the blood vessel together with the drug solution or the like. For this reason, prior to puncturing, an operation called priming is performed in which the indwelling needle device 1A is preliminarily filled with a liquid such as physiological saline or nutrient.
 図5~図7を参照しながら、プライミング操作時の液体の流れについて説明する。図5は、図2における内ハブ9近傍の拡大断面図を示している。図5には、内ハブ9の貫通孔22の貫通方向における断面が示されている。図6は、図5の断面方向と直交する方向における内ハブ9近傍の拡大断面図である。すなわち図6には、内ハブ9の貫通孔22の径方向における断面が示されている。図7は、内ハブ9の拡大斜視図を示している。 The flow of the liquid during the priming operation will be described with reference to FIGS. FIG. 5 shows an enlarged sectional view of the vicinity of the inner hub 9 in FIG. FIG. 5 shows a cross section in the penetration direction of the through hole 22 of the inner hub 9. 6 is an enlarged cross-sectional view of the vicinity of the inner hub 9 in a direction orthogonal to the cross-sectional direction of FIG. That is, FIG. 6 shows a cross section in the radial direction of the through hole 22 of the inner hub 9. FIG. 7 shows an enlarged perspective view of the inner hub 9.
 プライミング操作は、図2のように内針8が外針7から突出した状態で行なう。図5において、プライミング操作時には、チューブ10から内ハブ9に向かって(矢印b方向)生理食塩水等の液体が供給される。内ハブ9に供給された液体は、流路21を経て貫通孔22に流入する。貫通孔22内に流入した液体の一部は、内ハブ9の外周面側すなわち貫通孔22の両端の開口側に向かって(矢印c方向)流動し、他の一部は、内針8内に向かって(矢印d方向)流動する。 Priming operation is performed with the inner needle 8 protruding from the outer needle 7 as shown in FIG. In FIG. 5, during the priming operation, a liquid such as physiological saline is supplied from the tube 10 toward the inner hub 9 (in the direction of arrow b). The liquid supplied to the inner hub 9 flows into the through hole 22 through the flow path 21. A part of the liquid that has flowed into the through hole 22 flows toward the outer peripheral surface side of the inner hub 9, that is, toward the opening side of both ends of the through hole 22 (in the direction of arrow c). Toward (in the direction of arrow d).
 矢印c方向に流動した液体は、内ハブ9の外周面と外ハブ5の内周面との間を通って、内ハブ9の先端26側に向かう。貫通孔22の両端の開口から流出した液体の流れについて説明する前に、内ハブ9の構成及び内ハブ9と外ハブ5との関係について説明する。 The liquid that has flowed in the direction of arrow c passes between the outer peripheral surface of the inner hub 9 and the inner peripheral surface of the outer hub 5 and travels toward the tip 26 side of the inner hub 9. Before describing the flow of liquid flowing out from the openings at both ends of the through hole 22, the configuration of the inner hub 9 and the relationship between the inner hub 9 and the outer hub 5 will be described.
 図7は、内ハブ9の拡大斜視図を示している。内ハブ9の外周面23には、外周面23を窪ませた凹部23aが形成されている。凹部23aは貫通孔22の開口につながっている。図7の例では、内ハブ9の周方向において、凹部23aは貫通孔22を挟むように形成されている。また、凹部23aは、仕切り面23bを境に分割されている。 FIG. 7 shows an enlarged perspective view of the inner hub 9. The outer peripheral surface 23 of the inner hub 9 is formed with a concave portion 23a in which the outer peripheral surface 23 is recessed. The recess 23 a is connected to the opening of the through hole 22. In the example of FIG. 7, the recess 23 a is formed so as to sandwich the through hole 22 in the circumferential direction of the inner hub 9. Moreover, the recessed part 23a is divided | segmented on the partition surface 23b.
 なお、図7の図示は、内ハブ9の外周面の一部であり、貫通孔22の他方の開口側(紙面の裏側)にも、図7の図示と同様に、内ハブ9の周方向において、凹部23aが貫通孔22を挟むように形成されている。貫通孔22の一方の開口につながった凹部23aと、貫通孔22の他方の開口につながった凹部23aとは、一対の仕切り面23bによって分割されているので、周方向に連続していない。 7 is a part of the outer peripheral surface of the inner hub 9, and the other opening side (the back side of the paper surface) of the through hole 22 is arranged in the circumferential direction of the inner hub 9 as in the case of FIG. , The recess 23 a is formed so as to sandwich the through hole 22. Since the recess 23a connected to one opening of the through hole 22 and the recess 23a connected to the other opening of the through hole 22 are divided by the pair of partition surfaces 23b, they are not continuous in the circumferential direction.
 以下、貫通孔22から流出した液体の流動について具体的に説明する。図7の矢印e、f及びgは、貫通孔22から流出した液体の流動方向を示している。図7に示したように、貫通孔22の開口の、内ハブ9の周方向の両側は、一対の凹部23aとつながっている。凹部23aが形成された部分では、液体は凹部23aに案内されて流動する。 Hereinafter, the flow of the liquid flowing out from the through hole 22 will be specifically described. The arrows e, f and g in FIG. 7 indicate the flow direction of the liquid flowing out from the through hole 22. As shown in FIG. 7, both sides of the opening of the through hole 22 in the circumferential direction of the inner hub 9 are connected to the pair of recesses 23a. In the portion where the recess 23a is formed, the liquid flows while being guided by the recess 23a.
 このため、貫通孔22から流出した液体の一部は、凹部23aに沿って流れるように規制される。従って、貫通孔22の両側において、内ハブ9の周方向に進む流れ(矢印e)が生じる。 For this reason, a part of the liquid flowing out from the through hole 22 is regulated so as to flow along the recess 23a. Therefore, on both sides of the through hole 22, a flow (arrow e) that proceeds in the circumferential direction of the inner hub 9 occurs.
 前記の通り、凹部23aは、仕切り面23bを境に周方向に分割されている。凹部23aの深さは、貫通孔22の開口側から仕切り面23bに近づくにつれて浅くなっている。仕切り面23bは、凹部23aが形成された部分に比べ、外ハブ5の内周面と近接しているが、完全に密着していない(図6を参照)。このため、仕切り面23bと外ハブ5の内周面との間には、隙間30が形成されている。したがって、図7の矢印eで示した液体の流れは、仕切り面23b上に乗り上げることができる。液体は、仕切り面23b上に乗り上げた後、隙間30を流動しながら、内ハブ9の先端26側に向かう。 As described above, the recess 23a is divided in the circumferential direction with the partition surface 23b as a boundary. The depth of the recess 23a becomes shallower from the opening side of the through hole 22 toward the partition surface 23b. The partition surface 23b is closer to the inner peripheral surface of the outer hub 5 than the portion where the recess 23a is formed, but is not completely in close contact (see FIG. 6). For this reason, a gap 30 is formed between the partition surface 23 b and the inner peripheral surface of the outer hub 5. Therefore, the liquid flow indicated by the arrow e in FIG. 7 can run on the partition surface 23b. After the liquid rides on the partition surface 23 b, the liquid flows toward the front end 26 side of the inner hub 9 while flowing through the gap 30.
 また、図5、図6は、内ハブ9の、凹部23aが形成されていない部分の外周面23を示している。図5、図6に示された内ハブ9の外周面23は、外ハブ5の内周面と近接しているが、完全に密着していない。このため、内ハブ9の外周面23と外ハブ5の内周面との間には、隙間31が形成されている。したがって、図7の矢印f、gで示した液体は、隙間31(図5、図6)を流動しながら、内ハブ9の先端26側に向かう。 5 and 6 show the outer peripheral surface 23 of the portion of the inner hub 9 where the recess 23a is not formed. The outer peripheral surface 23 of the inner hub 9 shown in FIGS. 5 and 6 is close to the inner peripheral surface of the outer hub 5, but is not completely in close contact therewith. For this reason, a gap 31 is formed between the outer peripheral surface 23 of the inner hub 9 and the inner peripheral surface of the outer hub 5. Accordingly, the liquid indicated by the arrows f and g in FIG. 7 moves toward the tip 26 side of the inner hub 9 while flowing through the gap 31 (FIGS. 5 and 6).
 すなわち、貫通孔22から流出した液体は、全体として見れば、内ハブ9の先端26側に向かって内ハブ9の軸方向に進む。しかしながら、凹部23aにより液体の流れが規制されることにより、内ハブ9の周方向に進む流れも促進される。 That is, the liquid flowing out of the through hole 22 proceeds in the axial direction of the inner hub 9 toward the tip 26 side of the inner hub 9 as a whole. However, by restricting the liquid flow by the recess 23a, the flow proceeding in the circumferential direction of the inner hub 9 is also promoted.
 図3において、内ハブ9の先端26にまで流れた液体は、さらに外針7内に向かう。内ハブ9の先端26近傍と外ハブ5の内周面とは、完全に密着しておらず、両者間に隙間33が形成されている。また、外ハブ5の孔と内針8との間にも隙間34が形成されている。さらに外針7の内周面と内針8の外周面との間にも隙間35が形成されている。 In FIG. 3, the liquid that has flowed to the tip 26 of the inner hub 9 further moves into the outer needle 7. The vicinity of the tip 26 of the inner hub 9 and the inner peripheral surface of the outer hub 5 are not completely in close contact with each other, and a gap 33 is formed between them. A gap 34 is also formed between the hole of the outer hub 5 and the inner needle 8. Further, a gap 35 is also formed between the inner peripheral surface of the outer needle 7 and the outer peripheral surface of the inner needle 8.
 このため、隙間31を内ハブ9の先端26に向かって流れた液体は、隙間33、隙間34及び隙間35を経て、外針7の先端から流出(矢印h)する。他方、図5において矢印d方向に進む液体は、内針8の中空部を経て、図3の矢印iで示したように、内針8の先端から流出する。 Therefore, the liquid flowing through the gap 31 toward the tip 26 of the inner hub 9 flows out from the tip of the outer needle 7 (arrow h) through the gap 33, the gap 34, and the gap 35. On the other hand, the liquid traveling in the direction of the arrow d in FIG. 5 flows out from the tip of the inner needle 8 through the hollow portion of the inner needle 8 as indicated by the arrow i in FIG.
 したがって、留置針装置1Aに前記のようなプライミング操作を行うことにより、貫通孔22から内針8及び外針7の先端までの間の空間及び隙間に液体が充填され、これらの空間及び隙間から空気が排出される。 Therefore, by performing the priming operation as described above on the indwelling needle device 1A, the space and the gap between the through hole 22 and the tips of the inner needle 8 and the outer needle 7 are filled with liquid, and from these spaces and gaps Air is exhausted.
 次に、本実施形態1における内ハブ9を比較例と比較しながら説明する。図8は比較例に係る内ハブ100の斜視図を示している。内ハブ100の凹凸のない外周面101に径方向に貫通した貫通孔102が形成されている。内ハブ100の外周面101には、図7に示した内ハブ9のように、凹部23aは形成されていない。 Next, the inner hub 9 in the first embodiment will be described in comparison with a comparative example. FIG. 8 is a perspective view of the inner hub 100 according to the comparative example. A through hole 102 penetrating in the radial direction is formed on the outer peripheral surface 101 of the inner hub 100 having no irregularities. On the outer peripheral surface 101 of the inner hub 100, the concave portion 23a is not formed unlike the inner hub 9 shown in FIG.
 図8の内ハブ100において、貫通孔102からの液体は、内ハブ100の先端103側に向かって流出する。このため、内ハブ100の先端103側に向かって進む液体の流れ(矢印j、k)は強く、この流れと共に空気も排出され易い。 8, the liquid from the through hole 102 flows out toward the tip 103 side of the inner hub 100. For this reason, the liquid flow (arrows j and k) traveling toward the tip 103 side of the inner hub 100 is strong, and air is easily discharged together with this flow.
 これに対して、内ハブ100の周方向の流れ(矢印m)は弱い。このため、内ハブ100の周方向において、貫通孔102の開口から離れるにつれて、液体が行き渡りにくくなる。したがって、内ハブ100の周方向において、貫通孔102の開口から遠い部分では、気泡が滞留し易い。 On the other hand, the circumferential flow (arrow m) of the inner hub 100 is weak. For this reason, in the circumferential direction of the inner hub 100, the liquid becomes difficult to spread as the distance from the opening of the through hole 102 increases. Therefore, in the circumferential direction of the inner hub 100, bubbles are likely to stay in a portion far from the opening of the through hole 102.
 本実施形態1では、前記の通り、図7に示したように、凹部23aを形成したことにより、貫通孔22の開口から流出した液体を貫通孔22の周方向の両側に分流させるので、内ハブ9の周方向に進む流れを促進させることができる。このため、内ハブ9の周方向において、貫通孔22の開口から遠い部分でも、気泡の排出が促進される。 In the first embodiment, as described above, as shown in FIG. 7, the liquid flowing out from the opening of the through hole 22 is diverted to both sides in the circumferential direction of the through hole 22 by forming the recess 23a. The flow proceeding in the circumferential direction of the hub 9 can be promoted. For this reason, in the circumferential direction of the inner hub 9, discharge of bubbles is promoted even at a portion far from the opening of the through hole 22.
 また、前記のように、凹部23aの深さは、貫通孔22の開口から仕切り面23bに近づくにつれて浅くなっている。このことにより、液体の流れとともに気泡が仕切り面23bに乗り上げ、気泡が内ハブ9の先端26側に流動し易い。このことも、気泡の排出促進に有利である。 Further, as described above, the depth of the recess 23a becomes shallower from the opening of the through hole 22 toward the partition surface 23b. As a result, the bubbles run on the partition surface 23b together with the flow of the liquid, and the bubbles easily flow toward the tip 26 side of the inner hub 9. This is also advantageous for promoting the discharge of bubbles.
 なお、凹部23aにおいて、仕切り面23bに近づくにつれて深さが浅くなっている部分は、凹部23aの全体でもよいが凹部23aの一部であってもよい。例えば、凹部23aの深さは、周方向において、貫通孔22の開口からある地点までの領域では一定であり、この地点から仕切り面23までの領域では仕切り面23bに近づくにつれて徐々に浅くなっていてもよい。 In addition, in the recessed part 23a, the part which becomes shallow as the partition surface 23b is approached may be the entire recessed part 23a or a part of the recessed part 23a. For example, the depth of the recess 23a is constant in the region from the opening of the through hole 22 to a certain point in the circumferential direction, and gradually decreases in the region from this point to the partition surface 23 as it approaches the partition surface 23b. May be.
 したがって、本実施の形態によれば、プライミング操作による液体の充填により、空気を液体に確実に置換することができ、内ハブ9の外周面に気泡が滞留することを防止することができる。 Therefore, according to the present embodiment, air can be reliably replaced with liquid by filling the liquid by the priming operation, and bubbles can be prevented from staying on the outer peripheral surface of the inner hub 9.
 本発明者らの実験確認によると、気泡の滞留は内ハブ9の外周面の全体で発生するのではなく、特定の部分で選択的に発生する傾向がある。このため、気泡が滞留し易い部分に液体の流れが集中するように、凹部23aを大き過ぎないように形成することは、気泡の排出に効果的である。具体的には、図7に示すように、内ハブ9の軸方向において、凹部23aの幅Wは、貫通孔22の開口の長さLの1/2以下であることが好ましい。このことは、以下の図9~図11に示す例においても同様である。 According to the experiments confirmed by the present inventors, the retention of bubbles does not occur in the entire outer peripheral surface of the inner hub 9, but tends to occur selectively in a specific portion. For this reason, forming the recess 23a so as not to be too large so that the liquid flow concentrates on the portion where the bubbles tend to stay is effective in discharging the bubbles. Specifically, as shown in FIG. 7, in the axial direction of the inner hub 9, the width W of the recess 23 a is preferably equal to or less than ½ of the opening length L of the through hole 22. The same applies to the examples shown in FIGS. 9 to 11 below.
 以下、図9~図11を参照しながら、別の例について説明する。前記の例と同一構成又は近似した構成には、同一符号を付して、それらの説明を省略する。図9~図11では、貫通孔22の一方の開口側を図示しているが、貫通孔22の他方の開口側にも、図9~図11の図示と同様の形状が形成されている。 Hereinafter, another example will be described with reference to FIGS. The same configurations as those in the above example or similar configurations are denoted by the same reference numerals, and description thereof is omitted. 9 to 11 illustrate one opening side of the through hole 22, the same shape as that illustrated in FIGS. 9 to 11 is formed on the other opening side of the through hole 22.
 図9は、本実施形態1の第2の例に係る内ハブ40の拡大斜視図を示している。図7に示した内ハブ9では、凹部23aが仕切り面23bを境に周方向に分割されているのに対し、図9に示した内ハブ40では、貫通孔22が形成された部分を除いて、内ハブ40の全周に亘って凹部23aが形成されている。 FIG. 9 is an enlarged perspective view of the inner hub 40 according to the second example of the first embodiment. In the inner hub 9 shown in FIG. 7, the recess 23a is divided in the circumferential direction with the partition surface 23b as a boundary, whereas in the inner hub 40 shown in FIG. 9, the portion where the through hole 22 is formed is excluded. Thus, a recess 23 a is formed over the entire circumference of the inner hub 40.
 この構成では、図7の例と同様に、内ハブ9の先端26側に向かう矢印f、gで示した液体の流れが生じる。さらに、この構成においても、図7の例と同様に、凹部23aに沿って内ハブ40の周方向に進む液体の流れ(矢印e)を促進させることができるので、気泡の排出が促進される。 In this configuration, as in the example of FIG. 7, a liquid flow indicated by arrows f and g toward the tip 26 side of the inner hub 9 occurs. Furthermore, in this configuration as well, as in the example of FIG. 7, the flow of liquid (arrow e) traveling in the circumferential direction of the inner hub 40 along the recess 23 a can be promoted, so that the discharge of bubbles is promoted. .
 図10は、本実施形態1の第3の例に係る内ハブ50の拡大斜視図を示している。内ハブ50の外周面51には、外周面51を窪ませた凹部51aが形成されている。内ハブ50の凹部51aが内ハブ50の軸方向に延びた部分Bを含んでいる点が、前記の図7、図9に示した例と異なっている。 FIG. 10 is an enlarged perspective view of the inner hub 50 according to the third example of the first embodiment. On the outer peripheral surface 51 of the inner hub 50, a concave portion 51a in which the outer peripheral surface 51 is recessed is formed. The point which the recessed part 51a of the inner hub 50 contains the part B extended in the axial direction of the inner hub 50 differs from the example shown in the said FIG. 7, FIG.
 凹部51aの一部は、凹部51aの底面から突出した突起52により分岐している。突起52により分岐された凹部51aの部分Aは、貫通孔22と周方向につながっている。凹部51aの、部分Aより内ハブ9の先端53側の部分(部分B)は、内ハブ50の軸方向に延びるように形成されている。 A part of the recess 51a is branched by a protrusion 52 protruding from the bottom surface of the recess 51a. A portion A of the recess 51a branched by the protrusion 52 is connected to the through hole 22 in the circumferential direction. A portion (portion B) of the concave portion 51 a closer to the tip 53 of the inner hub 9 than the portion A is formed to extend in the axial direction of the inner hub 50.
 図10の例においても、図7の例と同様に、内ハブ50の先端53側に向かう矢印f、gで示した液体の流れが生じる。凹部51aの部分Aにおいては、内ハブ50の周方向に進む流れ(矢印n、p)が生じる。突起52の表面と外ハブ5(図5)の内周面とは、完全に密着しておらず、両者間に隙間が形成されている。このため、周方向に進む流れの一部(矢印n)は、突起52を乗り越えさらに周方向に進む。 In the example of FIG. 10 as well, the liquid flow indicated by the arrows f and g toward the tip 53 side of the inner hub 50 is generated as in the example of FIG. In the portion A of the recess 51a, a flow (arrows n, p) that proceeds in the circumferential direction of the inner hub 50 occurs. The surface of the protrusion 52 and the inner peripheral surface of the outer hub 5 (FIG. 5) are not completely in close contact with each other, and a gap is formed between them. For this reason, a part of the flow (arrow n) traveling in the circumferential direction passes over the protrusion 52 and further proceeds in the circumferential direction.
 したがって、図10の構成では、凹部51aに沿って内ハブ50の周方向に進む流れ(矢印n、p)が促進されるとともに、内ハブ50の軸方向に進む流れ(矢印r)も促進される。このため、図10の構成は、内ハブ50の軸方向における気泡の排出の促進にも有利である。 Therefore, in the configuration of FIG. 10, the flow (arrows n and p) proceeding in the circumferential direction of the inner hub 50 along the recess 51a is promoted, and the flow (arrow r) proceeding in the axial direction of the inner hub 50 is also promoted. The For this reason, the configuration of FIG. 10 is also advantageous for promoting the discharge of bubbles in the axial direction of the inner hub 50.
 図11は、本実施形態1の第4の例に係る内ハブ60の拡大斜視図を示している。内ハブ60の外周面61には、外周面61を窪ませた凹部61aが形成されている。内ハブ60の凹部61aが、内ハブ60の軸方向に延びた部分Bを含んでいる点が、前記の図7、図9に示した例と異なっている。 FIG. 11 is an enlarged perspective view of the inner hub 60 according to the fourth example of the first embodiment. On the outer peripheral surface 61 of the inner hub 60, a concave portion 61a in which the outer peripheral surface 61 is recessed is formed. The point which the recessed part 61a of the inner hub 60 contains the part B extended in the axial direction of the inner hub 60 is different from the example shown in the said FIG. 7, FIG.
 貫通孔22の開口は、凹部61aが形成された部分を除いて、突起62により囲まれている。凹部61aの部分Aは、貫通孔22と周方向につながっている。凹部61aの、部分Aより内ハブ60の先端63側の部分(部分B)は、内ハブ60の軸方向に延びるように形成されている。 The opening of the through hole 22 is surrounded by the protrusion 62 except for the portion where the recess 61a is formed. The portion A of the recess 61a is connected to the through hole 22 in the circumferential direction. A portion (portion B) of the concave portion 61 a closer to the tip 63 of the inner hub 60 than the portion A is formed to extend in the axial direction of the inner hub 60.
 図11の例においても、図7の例と同様に、内ハブ60の先端63側に向かう矢印f、gで示した液体の流れが生じる。凹部61aの部分Aにおいては、内ハブ50の周方向に進む流れ(矢印n、p)が生じる。内ハブ60の、凹部61aが形成されていない外周面61と外ハブ5(図5)の内周面とは、完全に密着しておらず、両者間に隙間が形成されている。このため、周方向に進む流れの一部(矢印n)は、外表面61を乗り越えさらに周方向に進む。 In the example of FIG. 11 as well, as in the example of FIG. 7, a liquid flow indicated by arrows f and g toward the tip 63 side of the inner hub 60 occurs. In the portion A of the recess 61a, a flow (arrows n, p) that proceeds in the circumferential direction of the inner hub 50 occurs. The outer peripheral surface 61 of the inner hub 60 where the recess 61a is not formed and the inner peripheral surface of the outer hub 5 (FIG. 5) are not completely in close contact with each other, and a gap is formed between them. For this reason, a part of the flow (arrow n) traveling in the circumferential direction gets over the outer surface 61 and further proceeds in the circumferential direction.
 したがって、図11の構成においても、図10の構成と同様に、凹部61aに沿って内ハブ60の周方向に進む流れ(矢印p、n)が促進されるとともに、内ハブ60の軸方向に進む流れ(矢印r)も促進される。このため、図11の構成も、内ハブ60の軸方向における気泡の排出の促進にも有利である。 Therefore, in the configuration of FIG. 11 as well, the flow (arrows p, n) that proceeds in the circumferential direction of the inner hub 60 along the recess 61a is promoted and the axial direction of the inner hub 60 is also promoted. The forward flow (arrow r) is also promoted. For this reason, the configuration of FIG. 11 is also advantageous for promoting the discharge of bubbles in the axial direction of the inner hub 60.
 以上、内ハブの各種例を説明したが、内ハブの形状は、貫通孔の開口と凹部とが周方向につながっており、凹部が貫通孔の開口から流出した液体を内ハブの周方向に導くことができる形状であればよく、前記の各種例に限られない。 Although various examples of the inner hub have been described above, the shape of the inner hub is such that the opening of the through hole and the recess are connected in the circumferential direction, and the recess flows the liquid flowing out of the opening of the through hole in the circumferential direction of the inner hub. Any shape that can be guided may be used, and the present invention is not limited to the above-described various examples.
 (実施形態2)
 図12は、本発明の実施形態2に係る留置針装置1Bの外観斜視図である。図13は、図12に示した留置針装置1Bの長手方向の断面図である。図14は、図13に示した留置針装置1Bの先端側の拡大図である。図15は、図13の状態から内針8をシールド筒4に引き込んだ状態を示す断面図である。まず図12~図15を参照しながら、留置針装置1Bの基本的な構成について説明する。
(Embodiment 2)
FIG. 12 is an external perspective view of an indwelling needle device 1B according to Embodiment 2 of the present invention. 13 is a cross-sectional view in the longitudinal direction of the indwelling needle device 1B shown in FIG. 14 is an enlarged view of the distal end side of the indwelling needle device 1B shown in FIG. 15 is a cross-sectional view showing a state in which the inner needle 8 is drawn into the shield tube 4 from the state of FIG. First, the basic configuration of the indwelling needle device 1B will be described with reference to FIGS.
 図12,図13おいて、留置針装置1Bは、シールド筒4の先端に外ハブ5が取り付けられた筒状の本体2を備える。本体2は、その先端側に針部3(図13)を備えている。図12では針部3には、キャップ6が装着されている。シールド筒4及び外ハブ5の材料としては、例えばポリカーボネート、ポリプロピレンが挙げられる。 12 and 13, the indwelling needle device 1B includes a cylindrical main body 2 having an outer hub 5 attached to the tip of the shield cylinder 4. The main body 2 includes a needle portion 3 (FIG. 13) on the distal end side. In FIG. 12, a cap 6 is attached to the needle portion 3. Examples of the material of the shield tube 4 and the outer hub 5 include polycarbonate and polypropylene.
 図14に示したように、針部3は、チューブ状の軟質の外針7の中空部内に、金属製の硬質の内針8が挿通された二重構造を有している。外針7は外ハブ5に固定され、内針8は、内ハブ9に固定されている。内ハブ9の材料としては、例えばポリカーボネート、ポリプロピレンが挙げられる。外針7の材料としては、例えばポリウレタン系エラストマー、ポリテトラフルオロエチレン等のフッ素樹脂が挙げられる。 As shown in FIG. 14, the needle portion 3 has a double structure in which a metal hard inner needle 8 is inserted into a hollow portion of a tube-shaped soft outer needle 7. The outer needle 7 is fixed to the outer hub 5, and the inner needle 8 is fixed to the inner hub 9. Examples of the material of the inner hub 9 include polycarbonate and polypropylene. Examples of the material of the outer needle 7 include fluorine resins such as polyurethane elastomers and polytetrafluoroethylene.
 本実施形態2では、内針8は貫通孔22内に突出していないが、実施形態1と同様に内針8を貫通孔22内に突出させて内ハブ9に固定してもよい。 In the second embodiment, the inner needle 8 does not protrude into the through hole 22, but the inner needle 8 may protrude into the through hole 22 and be fixed to the inner hub 9 as in the first embodiment.
 図13に示したように、内ハブ9は本体2内に収納されており、シールド筒4内を、シールド筒4の軸方向に移動可能である。内ハブ9には、シール用のOリング15が装着されている。内ハブ9の後端側の管状部20に、チューブ10が接続されている(図16参照)。チューブ10を矢印a方向に引くことにより、内ハブ9はシールド筒4内を矢印a方向に移動する。このことにより、内ハブ9と一体の内針8は、図15に示したように、シールド筒4内に引き込まれる。 As shown in FIG. 13, the inner hub 9 is housed in the main body 2, and can move in the shield tube 4 in the axial direction of the shield tube 4. An O-ring 15 for sealing is attached to the inner hub 9. The tube 10 is connected to the tubular portion 20 on the rear end side of the inner hub 9 (see FIG. 16). By pulling the tube 10 in the direction of arrow a, the inner hub 9 moves in the shield cylinder 4 in the direction of arrow a. As a result, the inner needle 8 integrated with the inner hub 9 is drawn into the shield tube 4 as shown in FIG.
 図12において、シールド筒4には、シールド筒4の外周を包み込むようにリング部16が取り付けられている。リング部16には、一対の翼部17が一体に設けられている。さらに、シールド筒4には、ハブ移動規制部材11が脱着可能に取り付けられている。ハブ移動規制部材11は、一対の片持部12を備えている。図12では、一対の片持部12のうち一方しか図示されていないが、シールド筒4を挟むように、一対の片持部12が配置されている。 In FIG. 12, a ring portion 16 is attached to the shield tube 4 so as to wrap around the outer periphery of the shield tube 4. A pair of wing parts 17 are provided integrally with the ring part 16. Further, a hub movement restricting member 11 is detachably attached to the shield tube 4. The hub movement restricting member 11 includes a pair of cantilever portions 12. In FIG. 12, only one of the pair of cantilever portions 12 is shown, but the pair of cantilever portions 12 are arranged so as to sandwich the shield tube 4.
 図12の状態で、一対の翼部17を上方に持ち上げて把持すると、一対の片持部12の先端部12aは一対の翼部17を介してリング部16に押し付けられるように把持される。一対の片持部12がこのように把持されている間は、ハブ移動規制部材11はシールド筒4に固定される。 12, when the pair of wing portions 17 are lifted and gripped upward, the tip portions 12 a of the pair of cantilever portions 12 are gripped so as to be pressed against the ring portion 16 via the pair of wing portions 17. While the pair of cantilevers 12 are gripped in this way, the hub movement restricting member 11 is fixed to the shield tube 4.
 更に、図13に示したように、ハブ移動規制部材11には、ストッパー13が一体に設けられている。図13の状態では、ストッパー13はシールド筒4内に挿入され、その先端13aが、内ハブ9の後端面9aに当接している。 Further, as shown in FIG. 13, the hub movement restricting member 11 is integrally provided with a stopper 13. In the state of FIG. 13, the stopper 13 is inserted into the shield tube 4, and the tip 13 a abuts against the rear end surface 9 a of the inner hub 9.
 このため、ハブ移動規制部材11の片持部12が把持されている状態では、内ハブ9及びこれと一体の内針8の移動も規制される。したがって、この状態で、内針8がシールド筒4側に押し戻されることなく、内針8を患者に穿刺することができる。 For this reason, when the cantilever 12 of the hub movement restricting member 11 is gripped, the movement of the inner hub 9 and the inner needle 8 integrated therewith is also restricted. Therefore, in this state, the inner needle 8 can be punctured into the patient without the inner needle 8 being pushed back to the shield tube 4 side.
 内針8の穿刺の際に、軟質の外針7も穿刺される。内針8及び外針7を穿刺した後に、片持部12の把持を解除し、チューブ10を矢印a方向に引くことにより、図15に示したように、内ハブ9と一体の内針8は、シールド筒4内に引き込まれる。このことにより、軟質の外針7のみを穿刺部分に留置することができる。これにより、患者が動いた際においても、穿刺部分の痛みを和らげることができ、また、血管の損傷を防止することができる。 When the inner needle 8 is punctured, the soft outer needle 7 is also punctured. After the inner needle 8 and the outer needle 7 are punctured, the gripping of the cantilever portion 12 is released, and the tube 10 is pulled in the direction of arrow a, whereby the inner needle 8 integrated with the inner hub 9 as shown in FIG. Is drawn into the shield tube 4. Thus, only the soft outer needle 7 can be placed in the puncture portion. Thereby, even when the patient moves, the pain at the puncture portion can be relieved, and damage to the blood vessel can be prevented.
 図15の状態において、患者へ投与する薬液等の液体は、チューブ10から内ハブ9内へ供給される。内ハブ9は、内ハブ9の軸方向に沿った流路21と、内ハブ9を、その径方向に貫通した貫通孔22とを備えている。流路21と貫通孔22とはつながっている。内ハブ9内に供給された液体は、流路21及び貫通孔22を経て、内ハブ9から流出する。内ハブ9から流出した液体は、本体2内を経て外針7の中空部に至り、患者の体内に投与される。 15, a liquid such as a chemical solution to be administered to the patient is supplied from the tube 10 into the inner hub 9. The inner hub 9 includes a flow path 21 along the axial direction of the inner hub 9 and a through hole 22 penetrating the inner hub 9 in the radial direction. The flow path 21 and the through hole 22 are connected. The liquid supplied into the inner hub 9 flows out from the inner hub 9 through the flow path 21 and the through hole 22. The liquid flowing out from the inner hub 9 passes through the main body 2 to the hollow portion of the outer needle 7 and is administered into the patient's body.
 ここで、薬液等の投与の際に、留置針装置1B内に空気があると、薬液等とともに空気が血管に入ってしまう。このため、穿刺に先立って、留置針装置1B内に、あらかじめ生理食塩水、栄養剤等の液体を充填するプライミングと呼ばれる操作が行われる。 Here, when there is air in the indwelling needle device 1B during administration of a drug solution or the like, the air enters the blood vessel together with the drug solution or the like. For this reason, prior to puncturing, an operation called priming is performed in which the indwelling needle device 1B is preliminarily filled with a liquid such as physiological saline or nutrient.
 図16~図18を参照しながら、プライミング操作時の液体の流れについて説明する。図16は、図13における内ハブ9近傍の拡大断面図を示している。図16には、内ハブ9の貫通孔22の貫通方向における断面が示されている。図17は、図16の断面方向と直交する方向における内ハブ9近傍の拡大断面図である。すなわち図17には、内ハブ9の貫通孔22の径方向における断面が示されている。図18は、内ハブ9の拡大斜視図を示している。 The flow of the liquid during the priming operation will be described with reference to FIGS. FIG. 16 shows an enlarged sectional view of the vicinity of the inner hub 9 in FIG. FIG. 16 shows a cross section in the through direction of the through hole 22 of the inner hub 9. FIG. 17 is an enlarged cross-sectional view of the vicinity of the inner hub 9 in a direction orthogonal to the cross-sectional direction of FIG. That is, FIG. 17 shows a cross section in the radial direction of the through hole 22 of the inner hub 9. FIG. 18 shows an enlarged perspective view of the inner hub 9.
 プライミング操作は、図13のように内針8が外針7から突出した状態で行なう。図16において、プライミング操作時には、チューブ10側から内ハブ9に向かって(矢印b方向)生理食塩水等の液体が供給される。内ハブ9に供給された液体は、流路21を経て貫通孔22に流入する。貫通孔22内に流入した液体の一部は、内ハブ9の外周面側すなわち貫通孔22の両端の開口側に向かって(矢印c方向)流動し、他の一部は、内針8内に向かって(矢印d方向)流動する。 Priming operation is performed with the inner needle 8 protruding from the outer needle 7 as shown in FIG. In FIG. 16, at the time of priming operation, a liquid such as physiological saline is supplied from the tube 10 side toward the inner hub 9 (in the direction of arrow b). The liquid supplied to the inner hub 9 flows into the through hole 22 through the flow path 21. A part of the liquid that has flowed into the through hole 22 flows toward the outer peripheral surface side of the inner hub 9, that is, toward the opening side of both ends of the through hole 22 (in the direction of arrow c). Toward (in the direction of arrow d).
 矢印c方向に流動した液体は、内ハブ9の外周面と外ハブ5の内周面との間を通って、内ハブ9の先端26側に向かう。貫通孔22の両端の開口から流出した液体の流れについて説明する前に、内ハブ9の構成及び内ハブ9と外ハブ5との関係について説明する。 The liquid that has flowed in the direction of arrow c passes between the outer peripheral surface of the inner hub 9 and the inner peripheral surface of the outer hub 5 and travels toward the tip 26 side of the inner hub 9. Before describing the flow of liquid flowing out from the openings at both ends of the through hole 22, the configuration of the inner hub 9 and the relationship between the inner hub 9 and the outer hub 5 will be described.
 図18は、内ハブ9の拡大斜視図を示している。内ハブ9の外周面23は、外周面23を窪ませた凹部23aを含み、外周面23には凹凸が形成されている。さらに、貫通孔22の内ハブ9の先端26側には、凹部23aから突出した突起25が形成されている。 FIG. 18 shows an enlarged perspective view of the inner hub 9. The outer peripheral surface 23 of the inner hub 9 includes a concave portion 23a in which the outer peripheral surface 23 is recessed, and the outer peripheral surface 23 is formed with irregularities. Further, a protrusion 25 protruding from the recess 23 a is formed on the end 26 side of the inner hub 9 of the through hole 22.
 なお、図18の図示は、内ハブ9の外周面23の一部であり、貫通孔22の他方の開口側(紙面の裏側)にも、図18の図示と同様の凹凸が形成されている。 18 is a part of the outer peripheral surface 23 of the inner hub 9, and the same unevenness as that shown in FIG. 18 is formed on the other opening side of the through hole 22 (the back side of the paper). .
 前記の通り、凹部23aは外周面23を窪ませて形成されたものである。このため、図16に示したように、凹部23aと外ハブ5の内周面との間に空間30が形成されている。図16に示した空間30は、図18に示した内ハブ9の凹部23aのうち、突起25と内ハブ9の先端26との間の部分に相当する。 As described above, the recess 23a is formed by recessing the outer peripheral surface 23. For this reason, as shown in FIG. 16, a space 30 is formed between the recess 23 a and the inner peripheral surface of the outer hub 5. The space 30 shown in FIG. 16 corresponds to a portion between the protrusion 25 and the tip 26 of the inner hub 9 in the recess 23a of the inner hub 9 shown in FIG.
 また、図18において凹部23aから突出した突起25は、図16の断面図にも図示されている。図16において、突起25の表面は、外ハブ5の内周面と近接しているが、完全に密着していない。このため、突起25の表面と外ハブ5の内周面との間には、隙間31bが形成されている。 Further, the protrusion 25 protruding from the recess 23a in FIG. 18 is also illustrated in the sectional view of FIG. In FIG. 16, the surface of the protrusion 25 is close to the inner peripheral surface of the outer hub 5, but is not completely in close contact. For this reason, a gap 31 b is formed between the surface of the protrusion 25 and the inner peripheral surface of the outer hub 5.
 このことは、内ハブ9の外周面23のうち凹部23aが形成されていない部分と外ハブ5の内周面との間においても同様である。内ハブ9の外周面23のうち凹部23aが形成されていない部分は、図17の断面図にも図示されている。図17において、内ハブ9の外周面23は、外ハブ5の内周面と近接していいるが、完全に密着していない。このため、内ハブ9の外周面23と外ハブ5の内周面との間には、隙間32が形成されている。 This is the same between the portion of the outer peripheral surface 23 of the inner hub 9 where the recess 23 a is not formed and the inner peripheral surface of the outer hub 5. A portion of the outer peripheral surface 23 of the inner hub 9 where the recess 23a is not formed is also illustrated in the cross-sectional view of FIG. In FIG. 17, the outer peripheral surface 23 of the inner hub 9 is close to the inner peripheral surface of the outer hub 5, but is not completely in close contact. For this reason, a gap 32 is formed between the outer peripheral surface 23 of the inner hub 9 and the inner peripheral surface of the outer hub 5.
 以上より、貫通孔22から流出した液体は、隙間31b(図16)、空間30(図16)、及び隙間32(図17)を流動しながら、内ハブ9の先端26側に向かう。 As described above, the liquid flowing out of the through hole 22 moves toward the tip 26 side of the inner hub 9 while flowing through the gap 31b (FIG. 16), the space 30 (FIG. 16), and the gap 32 (FIG. 17).
 以下、貫通孔22から流出した液体の流動について具体的に説明する。図18の矢印s、t及びgは、貫通孔22から流出した液体の流動方向を示している。図18において、突起25を平面視すると、突起25の壁面25aと貫通孔22の開口とが対向している。すなわち、壁面25aは貫通穴22の内周面の一部を構成している。このため、貫通孔22から液体が内ハブ9の先端26側に流出すると、液体の流れが突起25の壁面25aにより規制され、突起25の両側に分流した流れ(矢印s、t)が生じる。矢印s方向の流れは、主に空間30(図16)を内ハブ9の先端26側に向かって進み、矢印t方向の流れは、外周面23のうち凹部23aが形成されていない部分に回り込み、隙間32(図17)に流入する。 Hereinafter, the flow of the liquid flowing out from the through hole 22 will be specifically described. The arrows s, t and g in FIG. 18 indicate the flow direction of the liquid flowing out from the through hole 22. In FIG. 18, when the projection 25 is viewed in plan, the wall surface 25 a of the projection 25 faces the opening of the through hole 22. That is, the wall surface 25 a constitutes a part of the inner peripheral surface of the through hole 22. For this reason, when the liquid flows out from the through hole 22 toward the tip 26 side of the inner hub 9, the flow of the liquid is restricted by the wall surface 25 a of the protrusion 25, and a flow (arrows s, t) that is divided on both sides of the protrusion 25 is generated. The flow in the direction of the arrow s mainly travels through the space 30 (FIG. 16) toward the tip 26 side of the inner hub 9, and the flow in the direction of the arrow t wraps around the portion of the outer peripheral surface 23 where the recess 23a is not formed. , Flows into the gap 32 (FIG. 17).
 また、前記の通り、突起25の表面と外ハブ5の内周面との間には、隙間31bが形成されているので、隙間31bに入り突起25を乗り越える流れ(矢印g)も生じる。 As described above, since the gap 31b is formed between the surface of the protrusion 25 and the inner peripheral surface of the outer hub 5, a flow (arrow g) that enters the gap 31b and gets over the protrusion 25 also occurs.
 すなわち、貫通孔22から流出した液体は、全体として見れば、内ハブ9の先端26側に向かって内ハブ9の軸方向に進む。しかしながら、突起25により液体の流れが規制されることにより、内ハブ9の周方向に進む流れも促進される。 That is, the liquid flowing out of the through hole 22 proceeds in the axial direction of the inner hub 9 toward the tip 26 side of the inner hub 9 as a whole. However, by restricting the liquid flow by the protrusion 25, the flow proceeding in the circumferential direction of the inner hub 9 is also promoted.
 図14において、内ハブ9の先端26にまで流れた液体は、さらに外針7内に向かう。内ハブ9の先端26近傍と外ハブ5の内周面とは、完全に密着しておらず、両者間に隙間33が形成されている。また、外ハブ5の孔と内針8との間にも隙間34が形成されている。さらに外針7の内周面と内針8の外周面との間にも隙間35が形成されている。 In FIG. 14, the liquid that has flowed to the tip 26 of the inner hub 9 further moves into the outer needle 7. The vicinity of the tip 26 of the inner hub 9 and the inner peripheral surface of the outer hub 5 are not completely in close contact with each other, and a gap 33 is formed between them. A gap 34 is also formed between the hole of the outer hub 5 and the inner needle 8. Further, a gap 35 is also formed between the inner peripheral surface of the outer needle 7 and the outer peripheral surface of the inner needle 8.
 このため、内ハブ9の先端26に向かって流れた液体は、隙間33、隙間34及び隙間35を経て、外針7の先端から流出(矢印h)する。他方、図16において矢印d方向に進む液体は、内針8の中空部を経て、図14の矢印iで示したように、内針8の先端から流出する。 Therefore, the liquid flowing toward the tip 26 of the inner hub 9 flows out from the tip of the outer needle 7 (arrow h) through the gap 33, the gap 34, and the gap 35. On the other hand, the liquid traveling in the direction of the arrow d in FIG. 16 flows out from the tip of the inner needle 8 through the hollow portion of the inner needle 8 as indicated by the arrow i in FIG.
 したがって、留置針装置1Bに前記のようなプライミング操作を行うことにより、貫通孔22から内針8及び外針7の先端までの間の空間及び隙間に液体が充填され、これらの空間及び隙間から空気が排出される。 Therefore, by performing the priming operation as described above on the indwelling needle device 1B, the space and the gap between the through hole 22 and the tip of the inner needle 8 and the outer needle 7 are filled with liquid, and from these spaces and the gap, Air is exhausted.
 次に、本実施形態2における内ハブ9を比較例と比較しながら説明する。図19は比較例に係る内ハブ200の斜視図を示している。内ハブ200の凹凸のない外周面201に径方向に貫通した貫通孔202が形成されている。内ハブ200の外周面201には、図18に示した内ハブ9のように、凹部23a及び突起25は形成されていない。 Next, the inner hub 9 in the second embodiment will be described in comparison with a comparative example. FIG. 19 shows a perspective view of an inner hub 200 according to a comparative example. A through hole 202 penetrating in the radial direction is formed in the outer peripheral surface 201 of the inner hub 200 having no irregularities. On the outer peripheral surface 201 of the inner hub 200, the concave portion 23a and the protrusion 25 are not formed unlike the inner hub 9 shown in FIG.
 図19の内ハブ200において、貫通孔202からの液体は、内ハブ200の先端203側に向かって流出する。このため、貫通孔202と先端203とを結ぶ線上の液体の流れ(矢印j)は強く、この流れと共に空気も排出され易い。これに対して、内ハブ200の周方向への流れ(矢印m)は弱い。このため、内ハブ200の周方向においては、貫通孔202の開口から離れるにつれて、液体が行き渡りにくくなる。したがって、内ハブ200の周方向において、貫通孔202の開口から遠い部分では、気泡が滞留し易い。 In the inner hub 200 of FIG. 19, the liquid from the through hole 202 flows out toward the tip 203 side of the inner hub 200. For this reason, the liquid flow (arrow j) on the line connecting the through-hole 202 and the tip 203 is strong, and air is easily discharged together with this flow. On the other hand, the flow (arrow m) in the circumferential direction of the inner hub 200 is weak. For this reason, in the circumferential direction of the inner hub 200, the liquid becomes difficult to spread as the distance from the opening of the through hole 202 increases. Therefore, in the circumferential direction of the inner hub 200, bubbles are likely to stay in a portion far from the opening of the through hole 202.
 本実施形態2では、前記の通り、図18に示したように、突起25を形成したことにより、貫通孔22の開口から流出した液体を、突起25の周方向の両側に分流させるので、内ハブ9の周方向に進む流れを促進させることができる。このため、内ハブ9の周方向において、貫通孔22の開口から遠い部分でも、気泡の排出が促進される。 In the second embodiment, as described above, as shown in FIG. 18, by forming the protrusion 25, the liquid flowing out from the opening of the through hole 22 is diverted to both sides in the circumferential direction of the protrusion 25. The flow proceeding in the circumferential direction of the hub 9 can be promoted. For this reason, in the circumferential direction of the inner hub 9, discharge of bubbles is promoted even at a portion far from the opening of the through hole 22.
 また、図18に示したように、内ハブ9の周方向において、貫通孔22の開口は凹部23aに挟まれている。この構成では、凹部23aが液体の流れを内ハブ9の周方向に案内する溝の役割を果たし、このことによっても、内ハブ9の周方向に進む液体の流れが促進される。 Further, as shown in FIG. 18, in the circumferential direction of the inner hub 9, the opening of the through hole 22 is sandwiched between the recesses 23a. In this configuration, the recess 23 a serves as a groove for guiding the liquid flow in the circumferential direction of the inner hub 9. This also promotes the flow of liquid that proceeds in the circumferential direction of the inner hub 9.
 したがって、本実施形態2によれば、プライミング操作による液体の充填により、空気を液体に確実に置換することができ、内ハブ9の外周面に気泡が滞留することを防止することができる。 Therefore, according to the second embodiment, air can be reliably replaced with liquid by filling the liquid by the priming operation, and air bubbles can be prevented from staying on the outer peripheral surface of the inner hub 9.
 なお、図18において、突起25の形状は、貫通孔22の開口から流出し内ハブ9の先端26側に向かう液体を内ハブ9の周方向に導くように配置されていればよく、図18の形状に限られない。本実施形態2では、突起25を平面視したときに、突起25の周方向の両側の側面が略V字状に配置されており、突起25の周方向の幅は貫通孔22に近づくにつれて広がっている。この構成は、前記の通り、貫通孔22の開口から流出した直後の液体を突起25の壁面25aにより、内ハブ9の周方向に導くことができるとともに、突起25の先端26側の先端部(部分C)が尖った形状になるので、突起25の先端部Cに気泡が滞留することを防止することができる。 In FIG. 18, the shape of the protrusion 25 is not limited as long as it is arranged so as to guide the liquid flowing out from the opening of the through hole 22 toward the tip 26 side of the inner hub 9 in the circumferential direction of the inner hub 9. The shape is not limited. In the second embodiment, when the projection 25 is viewed in plan, the side surfaces on both sides in the circumferential direction of the projection 25 are arranged in a substantially V shape, and the circumferential width of the projection 25 increases as it approaches the through hole 22. ing. In this configuration, as described above, the liquid immediately after flowing out from the opening of the through hole 22 can be guided in the circumferential direction of the inner hub 9 by the wall surface 25a of the projection 25, and the tip portion (on the tip 26 side of the projection 25 ( Since the portion C) has a sharp shape, it is possible to prevent bubbles from staying at the tip C of the protrusion 25.
 図20は、本実施形態2の第2の例に係る内ハブ40の斜視図を示している。本図に示した内ハブ40は、図18に示した内ハブ9と突起25の位置が異なっている。図18に示した内ハブ9では、突起25と貫通孔22の開口との間に隙間が形成されていない。これに対して図19に示した内ハブ40では、突起25と貫通孔22の開口との間に寸法dの隙間が形成されている。寸法dは、内ハブ9を平面視したときに、内ハブ9の中心軸18上において、突起25と貫通孔22の開口との間の隙間の寸法である。 FIG. 20 is a perspective view of the inner hub 40 according to the second example of the second embodiment. The inner hub 40 shown in this figure is different from the inner hub 9 shown in FIG. In the inner hub 9 shown in FIG. 18, no gap is formed between the protrusion 25 and the opening of the through hole 22. On the other hand, in the inner hub 40 shown in FIG. 19, a gap having a dimension d is formed between the protrusion 25 and the opening of the through hole 22. The dimension d is the dimension of the gap between the protrusion 25 and the opening of the through hole 22 on the central axis 18 of the inner hub 9 when the inner hub 9 is viewed in plan.
 この構成であっても、貫通孔22の開口から流出した液体は、突起25の貫通孔22側の壁面25aに規制されて周方向に分流されるので、内ハブ40の周方向に進む流れが促進される。ただし、突起40が貫通孔22の開口から離れるにつれて、貫通孔22から周方向へ液体が行き渡りにくくなる。このため、寸法dは、貫通孔22の開口と内ハブ9の先端26との間の最短距離L2の1/2以下であることが望ましい。 Even in this configuration, the liquid flowing out from the opening of the through hole 22 is regulated by the wall surface 25a on the through hole 22 side of the protrusion 25 and is diverted in the circumferential direction. Promoted. However, as the protrusion 40 moves away from the opening of the through hole 22, it becomes difficult for the liquid to spread from the through hole 22 in the circumferential direction. For this reason, the dimension d is desirably less than or equal to ½ of the shortest distance L2 between the opening of the through hole 22 and the tip 26 of the inner hub 9.
 以上に説明した実施の形態は、いずれもあくまでも本発明の技術的内容を明らかにする意図のものであって、本発明はこのような具体例にのみ限定して解釈されるものではなく、その発明の精神と請求の範囲に記載する範囲内でいろいろと変更して実施することができ、本発明を広義に解釈すべきである。 The embodiments described above are intended to clarify the technical contents of the present invention, and the present invention is not construed as being limited to such specific examples. Various changes can be made within the spirit and scope of the present invention, and the present invention should be interpreted broadly.
 以上のように、本発明に係る針装置は、内ハブの外周面における気泡の滞留を防止することができるので、例えば輸液や輸血の際に用いられる医療用の針装置として有用である。 As described above, since the needle device according to the present invention can prevent air bubbles from staying on the outer peripheral surface of the inner hub, it is useful as, for example, a medical needle device used for transfusion or blood transfusion.
 1A,1B 留置針装置
 2 筒状の本体
 3 針部
 4 シールド筒
 5 外ハブ
 7 外針
 8 内針
 9,40,50,60 内ハブ
 18 内ハブの中心軸
 22 貫通孔
 23,51,61 内ハブの外周面
 23a,51a,61a 凹部
 23b 仕切り面
 25 突起
 25a 突起の壁面
 26,53,63 内ハブの先端
DESCRIPTION OF SYMBOLS 1A, 1B Indwelling needle apparatus 2 Cylindrical main body 3 Needle part 4 Shield cylinder 5 Outer hub 7 Outer needle 8 Inner needle 9, 40, 50, 60 Inner hub 18 Inner hub central axis 22 Through hole 23, 51, 61 In Hub outer surface 23a, 51a, 61a Recess 23b Partition surface 25 Projection 25a Projection wall 26, 53, 63 Tip of inner hub

Claims (13)

  1.  先端に針が取り付けられた内ハブと、
     前記内ハブが収納されている筒状の本体とを備え、
     前記内ハブは、
     前記内ハブの径方向に貫通した貫通孔と、
     前記内ハブの外周面に形成された凹部とを含んでおり、
     前記内ハブの周方向において、前記貫通孔の開口と前記凹部とがつながっていることを特徴とする針装置。
    An inner hub with a needle attached to the tip;
    A cylindrical main body in which the inner hub is housed,
    The inner hub is
    A through hole penetrating in the radial direction of the inner hub;
    Including a recess formed in the outer peripheral surface of the inner hub,
    In the circumferential direction of the inner hub, the opening of the through hole and the concave portion are connected to each other.
  2.  前記凹部は、前記貫通孔の開口から流出した液体を前記内ハブの周方向に導くように配置されている請求項1に記載の針装置。 The needle device according to claim 1, wherein the concave portion is arranged so as to guide the liquid flowing out from the opening of the through hole in a circumferential direction of the inner hub.
  3.  前記内ハブの周方向において、前記貫通孔の開口は前記凹部に挟まれている請求項1又は2に記載の針装置。 The needle device according to claim 1 or 2, wherein an opening of the through hole is sandwiched between the recesses in a circumferential direction of the inner hub.
  4.  前記凹部は、仕切り面を境に分割されており、かつ前記凹部内に、その深さが、前記貫通孔の開口側から前記仕切り面に近づくにつれて浅くなっている部分がある請求項1~3のいずれかに記載の針装置。 The recessed portion is divided at a partition surface, and a portion of the recessed portion has a depth that becomes shallower from the opening side of the through hole toward the partition surface. The needle device according to any one of the above.
  5.  前記凹部は、前記内ハブの軸方向に延びた部分を含んでいる請求項1~4のいずれかに記載の針装置。 The needle device according to any one of claims 1 to 4, wherein the concave portion includes a portion extending in an axial direction of the inner hub.
  6.  前記内ハブの軸方向において、前記凹部の幅は、前記貫通孔の開口の長さの1/2以下である請求項1~5のいずれかに記載の針装置。 The needle device according to any one of claims 1 to 5, wherein in the axial direction of the inner hub, the width of the concave portion is ½ or less of the length of the opening of the through hole.
  7.  先端に針が取り付けられた内ハブと、
     前記内ハブが収納されている筒状の本体とを備え、
     前記内ハブは、
     前記内ハブの径方向に貫通した貫通孔と、
     前記貫通孔の開口と前記内ハブの先端との間に形成され、前記内ハブの外周面から突出した突起とを含むことを特徴とする針装置。
    An inner hub with a needle attached to the tip;
    A cylindrical main body in which the inner hub is housed,
    The inner hub is
    A through hole penetrating in the radial direction of the inner hub;
    A needle device comprising: a protrusion formed between an opening of the through hole and a tip of the inner hub and protruding from an outer peripheral surface of the inner hub.
  8.  前記内ハブは、前記内ハブの外周面を窪ませた凹部を備えており、前記突起は、前記凹部から突出している請求項7に記載の針装置。 The needle device according to claim 7, wherein the inner hub includes a concave portion in which an outer peripheral surface of the inner hub is recessed, and the protrusion protrudes from the concave portion.
  9.  前記突起は、前記貫通孔の開口から流出した液体を前記内ハブの周方向に導くように配置されている請求項7又は8に記載の針装置。 The needle device according to claim 7 or 8, wherein the protrusion is arranged to guide the liquid flowing out from the opening of the through hole in a circumferential direction of the inner hub.
  10.  前記突起を平面視したときに、前記突起の壁面と前記貫通孔の開口とが対向している請求項7~9のいずれかに記載の針装置。 The needle device according to any one of claims 7 to 9, wherein when the projection is viewed in plan, the wall surface of the projection and the opening of the through hole are opposed to each other.
  11.  前記内ハブの周方向において、前記貫通孔の開口は前記凹部に挟まれている請求項8~10のいずれかに記載の針装置。 The needle device according to any one of claims 8 to 10, wherein an opening of the through hole is sandwiched between the recesses in a circumferential direction of the inner hub.
  12.  前記内ハブを平面視したときに、前記内ハブの中心軸上において、前記突起と前記貫通孔の開口との間の隙間の寸法は、前記貫通孔の開口と前記内ハブの先端との間の最短距離の1/2以下である請求項7~11のいずれかに記載の針装置。 When the inner hub is viewed in plan, on the central axis of the inner hub, the size of the gap between the protrusion and the opening of the through hole is between the opening of the through hole and the tip of the inner hub. The needle device according to any one of claims 7 to 11, which is ½ or less of the shortest distance.
  13.  前記内ハブを平面視したときに、前記突起の両側の側面が略V字状に配置されており、前記突起の幅は前記貫通孔に向かうにつれて広がっている請求項7~12のいずれかに記載の針装置。 The side surface on both sides of the projection is arranged in a substantially V shape when the inner hub is viewed in plan, and the width of the projection is widened toward the through hole. The needle device described.
PCT/JP2010/070603 2009-12-14 2010-11-18 Needle device WO2011074372A1 (en)

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EP10837401.8A EP2514452B1 (en) 2009-12-14 2010-11-18 Needle device
KR1020127018130A KR101717318B1 (en) 2009-12-14 2010-11-18 Needle device
HK13103015.0A HK1175726A1 (en) 2009-12-14 2013-03-11 Needle device

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EP2815782A4 (en) * 2012-02-17 2015-10-21 Jms Co Ltd Indwelling needle device

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US8911405B2 (en) 2014-12-16
KR101717318B1 (en) 2017-03-16
EP2514452A4 (en) 2013-06-05
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US20120220943A1 (en) 2012-08-30
HK1175726A1 (en) 2013-07-12

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